20662040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{677}}^1$

素因数の和:804

約数の個数: 64

約数和(自身を含む): 53697600

約数和(自身を除く): 33035560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 677, 763, 872, 1090, 1354, 1526, 2180, 2708, 3052, 3385, 3815, 4360, 4739, 5416, 6104, 6770, 7630, 9478, 13540, 15260, 18956, 23695, 27080, 30520, 37912, 47390, 73793, 94780, 147586, 189560, 295172, 368965, 516551, 590344, 737930, 1033102, 1475860, 2066204, 2582755, 2951720, 4132408, 5165510, 10331020, 20662040]

約数ペア:

[(1, 20662040), (2, 10331020), (4, 5165510), (5, 4132408), (7, 2951720), (8, 2582755), (10, 2066204), (14, 1475860), (20, 1033102), (28, 737930), (35, 590344), (40, 516551), (56, 368965), (70, 295172), (109, 189560), (140, 147586), (218, 94780), (280, 73793), (436, 47390), (545, 37912), (677, 30520), (763, 27080), (872, 23695), (1090, 18956), (1354, 15260), (1526, 13540), (2180, 9478), (2708, 7630), (3052, 6770), (3385, 6104), (3815, 5416), (4360, 4739)]