21325520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8599}}^1$

素因数の和:8643

約数の個数: 40

約数和(自身を含む): 51187200

約数和(自身を除く): 29861680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8599, 17198, 34396, 42995, 68792, 85990, 137584, 171980, 266569, 343960, 533138, 687920, 1066276, 1332845, 2132552, 2665690, 4265104, 5331380, 10662760, 21325520]

約数ペア:

[(1, 21325520), (2, 10662760), (4, 5331380), (5, 4265104), (8, 2665690), (10, 2132552), (16, 1332845), (20, 1066276), (31, 687920), (40, 533138), (62, 343960), (80, 266569), (124, 171980), (155, 137584), (248, 85990), (310, 68792), (496, 42995), (620, 34396), (1240, 17198), (2480, 8599)]