21530355

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{2663}}^1$

素因数の和:2696

約数の個数: 48

約数和(自身を含む): 43732224

約数和(自身を除く): 22201869

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 49, 55, 77, 105, 147, 165, 231, 245, 385, 539, 735, 1155, 1617, 2663, 2695, 7989, 8085, 13315, 18641, 29293, 39945, 55923, 87879, 93205, 130487, 146465, 205051, 279615, 391461, 439395, 615153, 652435, 1025255, 1435357, 1957305, 3075765, 4306071, 7176785, 21530355]

約数ペア:

[(1, 21530355), (3, 7176785), (5, 4306071), (7, 3075765), (11, 1957305), (15, 1435357), (21, 1025255), (33, 652435), (35, 615153), (49, 439395), (55, 391461), (77, 279615), (105, 205051), (147, 146465), (165, 130487), (231, 93205), (245, 87879), (385, 55923), (539, 39945), (735, 29293), (1155, 18641), (1617, 13315), (2663, 8085), (2695, 7989)]