21153275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 31643808

約数和(自身を除く): 10490533

約数列:

[1, 5, 11, 13, 25, 55, 61, 65, 97, 143, 275, 305, 325, 485, 671, 715, 793, 1067, 1261, 1525, 2425, 3355, 3575, 3965, 5335, 5917, 6305, 8723, 13871, 16775, 19825, 26675, 29585, 31525, 43615, 65087, 69355, 76921, 147925, 218075, 325435, 346775, 384605, 846131, 1627175, 1923025, 4230655, 21153275]

約数ペア:

[(1, 21153275), (5, 4230655), (11, 1923025), (13, 1627175), (25, 846131), (55, 384605), (61, 346775), (65, 325435), (97, 218075), (143, 147925), (275, 76921), (305, 69355), (325, 65087), (485, 43615), (671, 31525), (715, 29585), (793, 26675), (1067, 19825), (1261, 16775), (1525, 13871), (2425, 8723), (3355, 6305), (3575, 5917), (3965, 5335)]