20647640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{673}}^1$

素因数の和:756

約数の個数: 64

約数和(自身を含む): 50954400

約数和(自身を除く): 30306760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 673, 767, 1180, 1346, 1534, 2360, 2692, 3068, 3365, 3835, 5384, 6136, 6730, 7670, 8749, 13460, 15340, 17498, 26920, 30680, 34996, 39707, 43745, 69992, 79414, 87490, 158828, 174980, 198535, 317656, 349960, 397070, 516191, 794140, 1032382, 1588280, 2064764, 2580955, 4129528, 5161910, 10323820, 20647640]

約数ペア:

[(1, 20647640), (2, 10323820), (4, 5161910), (5, 4129528), (8, 2580955), (10, 2064764), (13, 1588280), (20, 1032382), (26, 794140), (40, 516191), (52, 397070), (59, 349960), (65, 317656), (104, 198535), (118, 174980), (130, 158828), (236, 87490), (260, 79414), (295, 69992), (472, 43745), (520, 39707), (590, 34996), (673, 30680), (767, 26920), (1180, 17498), (1346, 15340), (1534, 13460), (2360, 8749), (2692, 7670), (3068, 6730), (3365, 6136), (3835, 5384)]