399876490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:463

約数の個数: 64

約数和(自身を含む): 791513856

約数和(自身を除く): 391637366

約数列:

[1, 2, 5, 10, 13, 26, 65, 113, 130, 163, 167, 226, 326, 334, 565, 815, 835, 1130, 1469, 1630, 1670, 2119, 2171, 2938, 4238, 4342, 7345, 10595, 10855, 14690, 18419, 18871, 21190, 21710, 27221, 36838, 37742, 54442, 92095, 94355, 136105, 184190, 188710, 239447, 245323, 272210, 353873, 478894, 490646, 707746, 1197235, 1226615, 1769365, 2394470, 2453230, 3075973, 3538730, 6151946, 15379865, 30759730, 39987649, 79975298, 199938245, 399876490]

約数ペア:

[(1, 399876490), (2, 199938245), (5, 79975298), (10, 39987649), (13, 30759730), (26, 15379865), (65, 6151946), (113, 3538730), (130, 3075973), (163, 2453230), (167, 2394470), (226, 1769365), (326, 1226615), (334, 1197235), (565, 707746), (815, 490646), (835, 478894), (1130, 353873), (1469, 272210), (1630, 245323), (1670, 239447), (2119, 188710), (2171, 184190), (2938, 136105), (4238, 94355), (4342, 92095), (7345, 54442), (10595, 37742), (10855, 36838), (14690, 27221), (18419, 21710), (18871, 21190)]