20817940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{251}}^1$

素因数の和:313

約数の個数: 96

約数和(自身を含む): 53343360

約数和(自身を除く): 32525420

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 29, 44, 52, 55, 58, 65, 110, 116, 130, 143, 145, 220, 251, 260, 286, 290, 319, 377, 502, 572, 580, 638, 715, 754, 1004, 1255, 1276, 1430, 1508, 1595, 1885, 2510, 2761, 2860, 3190, 3263, 3770, 4147, 5020, 5522, 6380, 6526, 7279, 7540, 8294, 11044, 13052, 13805, 14558, 16315, 16588, 20735, 27610, 29116, 32630, 35893, 36395, 41470, 55220, 65260, 71786, 72790, 80069, 82940, 94627, 143572, 145580, 160138, 179465, 189254, 320276, 358930, 378508, 400345, 473135, 717860, 800690, 946270, 1040897, 1601380, 1892540, 2081794, 4163588, 5204485, 10408970, 20817940]

約数ペア:

[(1, 20817940), (2, 10408970), (4, 5204485), (5, 4163588), (10, 2081794), (11, 1892540), (13, 1601380), (20, 1040897), (22, 946270), (26, 800690), (29, 717860), (44, 473135), (52, 400345), (55, 378508), (58, 358930), (65, 320276), (110, 189254), (116, 179465), (130, 160138), (143, 145580), (145, 143572), (220, 94627), (251, 82940), (260, 80069), (286, 72790), (290, 71786), (319, 65260), (377, 55220), (502, 41470), (572, 36395), (580, 35893), (638, 32630), (715, 29116), (754, 27610), (1004, 20735), (1255, 16588), (1276, 16315), (1430, 14558), (1508, 13805), (1595, 13052), (1885, 11044), (2510, 8294), (2761, 7540), (2860, 7279), (3190, 6526), (3263, 6380), (3770, 5522), (4147, 5020)]