21638745

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^2\times {\mathrm{101}}^1$

素因数の和:164

約数の個数: 60

約数和(自身を含む): 40950756

約数和(自身を除く): 19312011

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 101, 115, 135, 207, 303, 345, 405, 505, 529, 621, 909, 1035, 1515, 1587, 1863, 2323, 2645, 2727, 3105, 4545, 4761, 6969, 7935, 8181, 9315, 11615, 13635, 14283, 20907, 23805, 34845, 40905, 42849, 53429, 62721, 71415, 104535, 160287, 188163, 214245, 267145, 313605, 480861, 801435, 940815, 1442583, 2404305, 4327749, 7212915, 21638745]

約数ペア:

[(1, 21638745), (3, 7212915), (5, 4327749), (9, 2404305), (15, 1442583), (23, 940815), (27, 801435), (45, 480861), (69, 313605), (81, 267145), (101, 214245), (115, 188163), (135, 160287), (207, 104535), (303, 71415), (345, 62721), (405, 53429), (505, 42849), (529, 40905), (621, 34845), (909, 23805), (1035, 20907), (1515, 14283), (1587, 13635), (1863, 11615), (2323, 9315), (2645, 8181), (2727, 7935), (3105, 6969), (4545, 4761)]