28201420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1373}}^1$

素因数の和:1474

約数の個数: 48

約数和(自身を含む): 64632960

約数和(自身を除く): 36431540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1373, 1580, 2054, 2746, 4108, 5135, 5492, 6865, 10270, 13730, 17849, 20540, 27460, 35698, 71396, 89245, 108467, 178490, 216934, 356980, 433868, 542335, 1084670, 1410071, 2169340, 2820142, 5640284, 7050355, 14100710, 28201420]

約数ペア:

[(1, 28201420), (2, 14100710), (4, 7050355), (5, 5640284), (10, 2820142), (13, 2169340), (20, 1410071), (26, 1084670), (52, 542335), (65, 433868), (79, 356980), (130, 216934), (158, 178490), (260, 108467), (316, 89245), (395, 71396), (790, 35698), (1027, 27460), (1373, 20540), (1580, 17849), (2054, 13730), (2746, 10270), (4108, 6865), (5135, 5492)]