21090780

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:345

約数の個数: 120

約数和(自身を含む): 67814208

約数和(自身を除く): 46723428

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 47, 54, 60, 81, 90, 94, 108, 135, 141, 162, 180, 188, 235, 270, 277, 282, 324, 405, 423, 470, 540, 554, 564, 705, 810, 831, 846, 940, 1108, 1269, 1385, 1410, 1620, 1662, 1692, 2115, 2493, 2538, 2770, 2820, 3324, 3807, 4155, 4230, 4986, 5076, 5540, 6345, 7479, 7614, 8310, 8460, 9972, 12465, 12690, 13019, 14958, 15228, 16620, 19035, 22437, 24930, 25380, 26038, 29916, 37395, 38070, 39057, 44874, 49860, 52076, 65095, 74790, 76140, 78114, 89748, 112185, 117171, 130190, 149580, 156228, 195285, 224370, 234342, 260380, 351513, 390570, 448740, 468684, 585855, 703026, 781140, 1054539, 1171710, 1406052, 1757565, 2109078, 2343420, 3515130, 4218156, 5272695, 7030260, 10545390, 21090780]

約数ペア:

[(1, 21090780), (2, 10545390), (3, 7030260), (4, 5272695), (5, 4218156), (6, 3515130), (9, 2343420), (10, 2109078), (12, 1757565), (15, 1406052), (18, 1171710), (20, 1054539), (27, 781140), (30, 703026), (36, 585855), (45, 468684), (47, 448740), (54, 390570), (60, 351513), (81, 260380), (90, 234342), (94, 224370), (108, 195285), (135, 156228), (141, 149580), (162, 130190), (180, 117171), (188, 112185), (235, 89748), (270, 78114), (277, 76140), (282, 74790), (324, 65095), (405, 52076), (423, 49860), (470, 44874), (540, 39057), (554, 38070), (564, 37395), (705, 29916), (810, 26038), (831, 25380), (846, 24930), (940, 22437), (1108, 19035), (1269, 16620), (1385, 15228), (1410, 14958), (1620, 13019), (1662, 12690), (1692, 12465), (2115, 9972), (2493, 8460), (2538, 8310), (2770, 7614), (2820, 7479), (3324, 6345), (3807, 5540), (4155, 5076), (4230, 4986)]