21146775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{41}}^1$

素因数の和:113

約数の個数: 72

約数和(自身を含む): 40320336

約数和(自身を除く): 19173561

約数列:

[1, 3, 5, 13, 15, 23, 25, 39, 41, 65, 69, 75, 115, 123, 195, 205, 299, 325, 345, 529, 533, 575, 615, 897, 943, 975, 1025, 1495, 1587, 1599, 1725, 2645, 2665, 2829, 3075, 4485, 4715, 6877, 7475, 7935, 7995, 12259, 13225, 13325, 14145, 20631, 21689, 22425, 23575, 34385, 36777, 39675, 39975, 61295, 65067, 70725, 103155, 108445, 171925, 183885, 281957, 306475, 325335, 515775, 542225, 845871, 919425, 1409785, 1626675, 4229355, 7048925, 21146775]

約数ペア:

[(1, 21146775), (3, 7048925), (5, 4229355), (13, 1626675), (15, 1409785), (23, 919425), (25, 845871), (39, 542225), (41, 515775), (65, 325335), (69, 306475), (75, 281957), (115, 183885), (123, 171925), (195, 108445), (205, 103155), (299, 70725), (325, 65067), (345, 61295), (529, 39975), (533, 39675), (575, 36777), (615, 34385), (897, 23575), (943, 22425), (975, 21689), (1025, 20631), (1495, 14145), (1587, 13325), (1599, 13225), (1725, 12259), (2645, 7995), (2665, 7935), (2829, 7475), (3075, 6877), (4485, 4715)]