20615960

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5791}}^1$

素因数の和:5891

約数の個数: 32

約数和(自身を含む): 46915200

約数和(自身を除く): 26299240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5791, 11582, 23164, 28955, 46328, 57910, 115820, 231640, 515399, 1030798, 2061596, 2576995, 4123192, 5153990, 10307980, 20615960]

約数ペア:

[(1, 20615960), (2, 10307980), (4, 5153990), (5, 4123192), (8, 2576995), (10, 2061596), (20, 1030798), (40, 515399), (89, 231640), (178, 115820), (356, 57910), (445, 46328), (712, 28955), (890, 23164), (1780, 11582), (3560, 5791)]