21389940

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1$

素因数の和:319

約数の個数: 192

約数和(自身を含む): 78462720

約数和(自身を除く): 57072780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 15, 18, 20, 22, 26, 27, 30, 33, 36, 39, 44, 45, 52, 54, 55, 60, 65, 66, 78, 90, 99, 108, 110, 117, 130, 132, 135, 143, 156, 165, 180, 195, 198, 220, 234, 260, 270, 277, 286, 297, 330, 351, 390, 396, 429, 468, 495, 540, 554, 572, 585, 594, 660, 702, 715, 780, 831, 858, 990, 1108, 1170, 1188, 1287, 1385, 1404, 1430, 1485, 1662, 1716, 1755, 1980, 2145, 2340, 2493, 2574, 2770, 2860, 2970, 3047, 3324, 3510, 3601, 3861, 4155, 4290, 4986, 5148, 5540, 5940, 6094, 6435, 7020, 7202, 7479, 7722, 8310, 8580, 9141, 9972, 10803, 12188, 12465, 12870, 14404, 14958, 15235, 15444, 16620, 18005, 18282, 19305, 21606, 24930, 25740, 27423, 29916, 30470, 32409, 36010, 36564, 37395, 38610, 39611, 43212, 45705, 49860, 54015, 54846, 60940, 64818, 72020, 74790, 77220, 79222, 82269, 91410, 97227, 108030, 109692, 118833, 129636, 137115, 149580, 158444, 162045, 164538, 182820, 194454, 198055, 216060, 237666, 274230, 324090, 329076, 356499, 388908, 396110, 411345, 475332, 486135, 548460, 594165, 648180, 712998, 792220, 822690, 972270, 1069497, 1188330, 1425996, 1645380, 1782495, 1944540, 2138994, 2376660, 3564990, 4277988, 5347485, 7129980, 10694970, 21389940]

約数ペア:

[(1, 21389940), (2, 10694970), (3, 7129980), (4, 5347485), (5, 4277988), (6, 3564990), (9, 2376660), (10, 2138994), (11, 1944540), (12, 1782495), (13, 1645380), (15, 1425996), (18, 1188330), (20, 1069497), (22, 972270), (26, 822690), (27, 792220), (30, 712998), (33, 648180), (36, 594165), (39, 548460), (44, 486135), (45, 475332), (52, 411345), (54, 396110), (55, 388908), (60, 356499), (65, 329076), (66, 324090), (78, 274230), (90, 237666), (99, 216060), (108, 198055), (110, 194454), (117, 182820), (130, 164538), (132, 162045), (135, 158444), (143, 149580), (156, 137115), (165, 129636), (180, 118833), (195, 109692), (198, 108030), (220, 97227), (234, 91410), (260, 82269), (270, 79222), (277, 77220), (286, 74790), (297, 72020), (330, 64818), (351, 60940), (390, 54846), (396, 54015), (429, 49860), (468, 45705), (495, 43212), (540, 39611), (554, 38610), (572, 37395), (585, 36564), (594, 36010), (660, 32409), (702, 30470), (715, 29916), (780, 27423), (831, 25740), (858, 24930), (990, 21606), (1108, 19305), (1170, 18282), (1188, 18005), (1287, 16620), (1385, 15444), (1404, 15235), (1430, 14958), (1485, 14404), (1662, 12870), (1716, 12465), (1755, 12188), (1980, 10803), (2145, 9972), (2340, 9141), (2493, 8580), (2574, 8310), (2770, 7722), (2860, 7479), (2970, 7202), (3047, 7020), (3324, 6435), (3510, 6094), (3601, 5940), (3861, 5540), (4155, 5148), (4290, 4986)]