64720720

素因数分解:

$2^4\times 5^1\times {\mathrm{823}}^1\times {\mathrm{983}}^1$

素因数の和:1819

約数の個数: 40

約数和(自身を含む): 150811776

約数和(自身を除く): 86091056

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 823, 983, 1646, 1966, 3292, 3932, 4115, 4915, 6584, 7864, 8230, 9830, 13168, 15728, 16460, 19660, 32920, 39320, 65840, 78640, 809009, 1618018, 3236036, 4045045, 6472072, 8090090, 12944144, 16180180, 32360360, 64720720]

約数ペア:

[(1, 64720720), (2, 32360360), (4, 16180180), (5, 12944144), (8, 8090090), (10, 6472072), (16, 4045045), (20, 3236036), (40, 1618018), (80, 809009), (823, 78640), (983, 65840), (1646, 39320), (1966, 32920), (3292, 19660), (3932, 16460), (4115, 15728), (4915, 13168), (6584, 9830), (7864, 8230)]