20981412

素因数分解:

$2^2\times 3^2\times {\mathrm{491}}^1\times {\mathrm{1187}}^1$

素因数の和:1688

約数の個数: 36

約数和(自身を含む): 53189136

約数和(自身を除く): 32207724

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 491, 982, 1187, 1473, 1964, 2374, 2946, 3561, 4419, 4748, 5892, 7122, 8838, 10683, 14244, 17676, 21366, 42732, 582817, 1165634, 1748451, 2331268, 3496902, 5245353, 6993804, 10490706, 20981412]

約数ペア:

[(1, 20981412), (2, 10490706), (3, 6993804), (4, 5245353), (6, 3496902), (9, 2331268), (12, 1748451), (18, 1165634), (36, 582817), (491, 42732), (982, 21366), (1187, 17676), (1473, 14244), (1964, 10683), (2374, 8838), (2946, 7122), (3561, 5892), (4419, 4748)]