21155225

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{547}}^1$

素因数の和:594

約数の個数: 48

約数和(自身を含む): 34247808

約数和(自身を除く): 13092583

約数列:

[1, 5, 7, 13, 17, 25, 35, 65, 85, 91, 119, 175, 221, 325, 425, 455, 547, 595, 1105, 1547, 2275, 2735, 2975, 3829, 5525, 7111, 7735, 9299, 13675, 19145, 35555, 38675, 46495, 49777, 65093, 95725, 120887, 177775, 232475, 248885, 325465, 604435, 846209, 1244425, 1627325, 3022175, 4231045, 21155225]

約数ペア:

[(1, 21155225), (5, 4231045), (7, 3022175), (13, 1627325), (17, 1244425), (25, 846209), (35, 604435), (65, 325465), (85, 248885), (91, 232475), (119, 177775), (175, 120887), (221, 95725), (325, 65093), (425, 49777), (455, 46495), (547, 38675), (595, 35555), (1105, 19145), (1547, 13675), (2275, 9299), (2735, 7735), (2975, 7111), (3829, 5525)]