991315960

素因数分解:

$2^3\times 5^1\times {\mathrm{461}}^1\times {\mathrm{53759}}^1$

素因数の和:54231

約数の個数: 32

約数和(自身を含む): 2235340800

約数和(自身を除く): 1244024840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 461, 922, 1844, 2305, 3688, 4610, 9220, 18440, 53759, 107518, 215036, 268795, 430072, 537590, 1075180, 2150360, 24782899, 49565798, 99131596, 123914495, 198263192, 247828990, 495657980, 991315960]

約数ペア:

[(1, 991315960), (2, 495657980), (4, 247828990), (5, 198263192), (8, 123914495), (10, 99131596), (20, 49565798), (40, 24782899), (461, 2150360), (922, 1075180), (1844, 537590), (2305, 430072), (3688, 268795), (4610, 215036), (9220, 107518), (18440, 53759)]