20954960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20149}}^1$

素因数の和:20175

約数の個数: 40

約数和(自身を含む): 52470600

約数和(自身を除く): 31515640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20149, 40298, 80596, 100745, 161192, 201490, 261937, 322384, 402980, 523874, 805960, 1047748, 1309685, 1611920, 2095496, 2619370, 4190992, 5238740, 10477480, 20954960]

約数ペア:

[(1, 20954960), (2, 10477480), (4, 5238740), (5, 4190992), (8, 2619370), (10, 2095496), (13, 1611920), (16, 1309685), (20, 1047748), (26, 805960), (40, 523874), (52, 402980), (65, 322384), (80, 261937), (104, 201490), (130, 161192), (208, 100745), (260, 80596), (520, 40298), (1040, 20149)]