21601580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{83}}^1$

素因数の和:136

約数の個数: 144

約数和(自身を含む): 61979904

約数和(自身を除く): 40378324

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 83, 91, 110, 130, 140, 143, 154, 166, 169, 182, 220, 260, 286, 308, 332, 338, 364, 385, 415, 455, 572, 581, 676, 715, 770, 830, 845, 910, 913, 1001, 1079, 1162, 1183, 1430, 1540, 1660, 1690, 1820, 1826, 1859, 2002, 2158, 2324, 2366, 2860, 2905, 3380, 3652, 3718, 4004, 4316, 4565, 4732, 5005, 5395, 5810, 5915, 6391, 7436, 7553, 9130, 9295, 10010, 10790, 11620, 11830, 11869, 12782, 13013, 14027, 15106, 18260, 18590, 20020, 21580, 23660, 23738, 25564, 26026, 28054, 30212, 31955, 37180, 37765, 47476, 52052, 56108, 59345, 63910, 65065, 70135, 75530, 83083, 98189, 118690, 127820, 130130, 140270, 151060, 154297, 166166, 196378, 237380, 260260, 280540, 308594, 332332, 392756, 415415, 490945, 617188, 771485, 830830, 981890, 1080079, 1542970, 1661660, 1963780, 2160158, 3085940, 4320316, 5400395, 10800790, 21601580]

約数ペア:

[(1, 21601580), (2, 10800790), (4, 5400395), (5, 4320316), (7, 3085940), (10, 2160158), (11, 1963780), (13, 1661660), (14, 1542970), (20, 1080079), (22, 981890), (26, 830830), (28, 771485), (35, 617188), (44, 490945), (52, 415415), (55, 392756), (65, 332332), (70, 308594), (77, 280540), (83, 260260), (91, 237380), (110, 196378), (130, 166166), (140, 154297), (143, 151060), (154, 140270), (166, 130130), (169, 127820), (182, 118690), (220, 98189), (260, 83083), (286, 75530), (308, 70135), (332, 65065), (338, 63910), (364, 59345), (385, 56108), (415, 52052), (455, 47476), (572, 37765), (581, 37180), (676, 31955), (715, 30212), (770, 28054), (830, 26026), (845, 25564), (910, 23738), (913, 23660), (1001, 21580), (1079, 20020), (1162, 18590), (1183, 18260), (1430, 15106), (1540, 14027), (1660, 13013), (1690, 12782), (1820, 11869), (1826, 11830), (1859, 11620), (2002, 10790), (2158, 10010), (2324, 9295), (2366, 9130), (2860, 7553), (2905, 7436), (3380, 6391), (3652, 5915), (3718, 5810), (4004, 5395), (4316, 5005), (4565, 4732)]