20947550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:142

約数の個数: 72

約数和(自身を含む): 43977096

約数和(自身を除く): 23029546

約数列:

[1, 2, 5, 10, 13, 25, 26, 37, 50, 65, 67, 74, 130, 134, 169, 185, 325, 335, 338, 370, 481, 650, 670, 845, 871, 925, 962, 1675, 1690, 1742, 1850, 2405, 2479, 3350, 4225, 4355, 4810, 4958, 6253, 8450, 8710, 11323, 12025, 12395, 12506, 21775, 22646, 24050, 24790, 31265, 32227, 43550, 56615, 61975, 62530, 64454, 113230, 123950, 156325, 161135, 283075, 312650, 322270, 418951, 566150, 805675, 837902, 1611350, 2094755, 4189510, 10473775, 20947550]

約数ペア:

[(1, 20947550), (2, 10473775), (5, 4189510), (10, 2094755), (13, 1611350), (25, 837902), (26, 805675), (37, 566150), (50, 418951), (65, 322270), (67, 312650), (74, 283075), (130, 161135), (134, 156325), (169, 123950), (185, 113230), (325, 64454), (335, 62530), (338, 61975), (370, 56615), (481, 43550), (650, 32227), (670, 31265), (845, 24790), (871, 24050), (925, 22646), (962, 21775), (1675, 12506), (1690, 12395), (1742, 12025), (1850, 11323), (2405, 8710), (2479, 8450), (3350, 6253), (4225, 4958), (4355, 4810)]