66658640

素因数分解:

$2^4\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1637}}^1$

素因数の和:2159

約数の個数: 40

約数和(自身を含む): 155380680

約数和(自身を除く): 88722040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 1018, 1637, 2036, 2545, 3274, 4072, 5090, 6548, 8144, 8185, 10180, 13096, 16370, 20360, 26192, 32740, 40720, 65480, 130960, 833233, 1666466, 3332932, 4166165, 6665864, 8332330, 13331728, 16664660, 33329320, 66658640]

約数ペア:

[(1, 66658640), (2, 33329320), (4, 16664660), (5, 13331728), (8, 8332330), (10, 6665864), (16, 4166165), (20, 3332932), (40, 1666466), (80, 833233), (509, 130960), (1018, 65480), (1637, 40720), (2036, 32740), (2545, 26192), (3274, 20360), (4072, 16370), (5090, 13096), (6548, 10180), (8144, 8185)]