21545825

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 32783616

約数和(自身を除く): 11237791

約数列:

[1, 5, 7, 23, 25, 35, 53, 101, 115, 161, 175, 265, 371, 505, 575, 707, 805, 1219, 1325, 1855, 2323, 2525, 3535, 4025, 5353, 6095, 8533, 9275, 11615, 16261, 17675, 26765, 30475, 37471, 42665, 58075, 81305, 123119, 133825, 187355, 213325, 406525, 615595, 861833, 936775, 3077975, 4309165, 21545825]

約数ペア:

[(1, 21545825), (5, 4309165), (7, 3077975), (23, 936775), (25, 861833), (35, 615595), (53, 406525), (101, 213325), (115, 187355), (161, 133825), (175, 123119), (265, 81305), (371, 58075), (505, 42665), (575, 37471), (707, 30475), (805, 26765), (1219, 17675), (1325, 16261), (1855, 11615), (2323, 9275), (2525, 8533), (3535, 6095), (4025, 5353)]