20399600

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{3923}}^1$

素因数の和:3954

約数の個数: 60

約数和(自身を含む): 52793496

約数和(自身を除く): 32393896

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 3923, 5200, 7846, 15692, 19615, 31384, 39230, 50999, 62768, 78460, 98075, 101998, 156920, 196150, 203996, 254995, 313840, 392300, 407992, 509990, 784600, 815984, 1019980, 1274975, 1569200, 2039960, 2549950, 4079920, 5099900, 10199800, 20399600]

約数ペア:

[(1, 20399600), (2, 10199800), (4, 5099900), (5, 4079920), (8, 2549950), (10, 2039960), (13, 1569200), (16, 1274975), (20, 1019980), (25, 815984), (26, 784600), (40, 509990), (50, 407992), (52, 392300), (65, 313840), (80, 254995), (100, 203996), (104, 196150), (130, 156920), (200, 101998), (208, 98075), (260, 78460), (325, 62768), (400, 50999), (520, 39230), (650, 31384), (1040, 19615), (1300, 15692), (2600, 7846), (3923, 5200)]