19663960

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8059}}^1$

素因数の和:8131

約数の個数: 32

約数和(自身を含む): 44974800

約数和(自身を除く): 25310840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8059, 16118, 32236, 40295, 64472, 80590, 161180, 322360, 491599, 983198, 1966396, 2457995, 3932792, 4915990, 9831980, 19663960]

約数ペア:

[(1, 19663960), (2, 9831980), (4, 4915990), (5, 3932792), (8, 2457995), (10, 1966396), (20, 983198), (40, 491599), (61, 322360), (122, 161180), (244, 80590), (305, 64472), (488, 40295), (610, 32236), (1220, 16118), (2440, 8059)]