21347925

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 37854720

約数和(自身を除く): 16506795

約数列:

[1, 3, 5, 15, 19, 25, 57, 71, 75, 95, 211, 213, 285, 355, 475, 633, 1055, 1065, 1349, 1425, 1775, 3165, 4009, 4047, 5275, 5325, 6745, 12027, 14981, 15825, 20045, 20235, 33725, 44943, 60135, 74905, 100225, 101175, 224715, 284639, 300675, 374525, 853917, 1123575, 1423195, 4269585, 7115975, 21347925]

約数ペア:

[(1, 21347925), (3, 7115975), (5, 4269585), (15, 1423195), (19, 1123575), (25, 853917), (57, 374525), (71, 300675), (75, 284639), (95, 224715), (211, 101175), (213, 100225), (285, 74905), (355, 60135), (475, 44943), (633, 33725), (1055, 20235), (1065, 20045), (1349, 15825), (1425, 14981), (1775, 12027), (3165, 6745), (4009, 5325), (4047, 5275)]