19789900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1171}}^1$

素因数の和:1211

約数の個数: 54

約数和(自身を含む): 46541292

約数和(自身を除く): 26751392

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 169, 260, 325, 338, 650, 676, 845, 1171, 1300, 1690, 2342, 3380, 4225, 4684, 5855, 8450, 11710, 15223, 16900, 23420, 29275, 30446, 58550, 60892, 76115, 117100, 152230, 197899, 304460, 380575, 395798, 761150, 791596, 989495, 1522300, 1978990, 3957980, 4947475, 9894950, 19789900]

約数ペア:

[(1, 19789900), (2, 9894950), (4, 4947475), (5, 3957980), (10, 1978990), (13, 1522300), (20, 989495), (25, 791596), (26, 761150), (50, 395798), (52, 380575), (65, 304460), (100, 197899), (130, 152230), (169, 117100), (260, 76115), (325, 60892), (338, 58550), (650, 30446), (676, 29275), (845, 23420), (1171, 16900), (1300, 15223), (1690, 11710), (2342, 8450), (3380, 5855), (4225, 4684)]