201621520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{81299}}^1$

素因数の和:81343

約数の個数: 40

約数和(自身を含む): 483897600

約数和(自身を除く): 282276080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 81299, 162598, 325196, 406495, 650392, 812990, 1300784, 1625980, 2520269, 3251960, 5040538, 6503920, 10081076, 12601345, 20162152, 25202690, 40324304, 50405380, 100810760, 201621520]

約数ペア:

[(1, 201621520), (2, 100810760), (4, 50405380), (5, 40324304), (8, 25202690), (10, 20162152), (16, 12601345), (20, 10081076), (31, 6503920), (40, 5040538), (62, 3251960), (80, 2520269), (124, 1625980), (155, 1300784), (248, 812990), (310, 650392), (496, 406495), (620, 325196), (1240, 162598), (2480, 81299)]