20955025

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 32720128

約数和(自身を除く): 11765103

約数列:

[1, 5, 7, 13, 25, 35, 61, 65, 91, 151, 175, 305, 325, 427, 455, 755, 793, 1057, 1525, 1963, 2135, 2275, 3775, 3965, 5285, 5551, 9211, 9815, 10675, 13741, 19825, 26425, 27755, 46055, 49075, 64477, 68705, 119743, 138775, 230275, 322385, 343525, 598715, 838201, 1611925, 2993575, 4191005, 20955025]

約数ペア:

[(1, 20955025), (5, 4191005), (7, 2993575), (13, 1611925), (25, 838201), (35, 598715), (61, 343525), (65, 322385), (91, 230275), (151, 138775), (175, 119743), (305, 68705), (325, 64477), (427, 49075), (455, 46055), (755, 27755), (793, 26425), (1057, 19825), (1525, 13741), (1963, 10675), (2135, 9815), (2275, 9211), (3775, 5551), (3965, 5285)]