644122960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{19979}}^1$

素因数の和:20036

約数の個数: 80

約数和(自身を含む): 1664893440

約数和(自身を除く): 1020770480

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2480, 3224, 4030, 6448, 8060, 16120, 19979, 32240, 39958, 79916, 99895, 159832, 199790, 259727, 319664, 399580, 519454, 619349, 799160, 1038908, 1238698, 1298635, 1598320, 2077816, 2477396, 2597270, 3096745, 4155632, 4954792, 5194540, 6193490, 8051537, 9909584, 10389080, 12386980, 16103074, 20778160, 24773960, 32206148, 40257685, 49547920, 64412296, 80515370, 128824592, 161030740, 322061480, 644122960]

約数ペア:

[(1, 644122960), (2, 322061480), (4, 161030740), (5, 128824592), (8, 80515370), (10, 64412296), (13, 49547920), (16, 40257685), (20, 32206148), (26, 24773960), (31, 20778160), (40, 16103074), (52, 12386980), (62, 10389080), (65, 9909584), (80, 8051537), (104, 6193490), (124, 5194540), (130, 4954792), (155, 4155632), (208, 3096745), (248, 2597270), (260, 2477396), (310, 2077816), (403, 1598320), (496, 1298635), (520, 1238698), (620, 1038908), (806, 799160), (1040, 619349), (1240, 519454), (1612, 399580), (2015, 319664), (2480, 259727), (3224, 199790), (4030, 159832), (6448, 99895), (8060, 79916), (16120, 39958), (19979, 32240)]