21272125

素因数分解:

$5^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:203

約数の個数: 48

約数和(自身を含む): 32438016

約数和(自身を除く): 11165891

約数列:

[1, 5, 7, 23, 25, 35, 49, 115, 125, 151, 161, 175, 245, 575, 755, 805, 875, 1057, 1127, 1225, 2875, 3473, 3775, 4025, 5285, 5635, 6125, 7399, 17365, 18875, 20125, 24311, 26425, 28175, 36995, 86825, 121555, 132125, 140875, 170177, 184975, 434125, 607775, 850885, 924875, 3038875, 4254425, 21272125]

約数ペア:

[(1, 21272125), (5, 4254425), (7, 3038875), (23, 924875), (25, 850885), (35, 607775), (49, 434125), (115, 184975), (125, 170177), (151, 140875), (161, 132125), (175, 121555), (245, 86825), (575, 36995), (755, 28175), (805, 26425), (875, 24311), (1057, 20125), (1127, 18875), (1225, 17365), (2875, 7399), (3473, 6125), (3775, 5635), (4025, 5285)]