21640665

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{353}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 35819136

約数和(自身を除く): 14178471

約数列:

[1, 3, 5, 15, 61, 67, 183, 201, 305, 335, 353, 915, 1005, 1059, 1765, 4087, 5295, 12261, 20435, 21533, 23651, 61305, 64599, 70953, 107665, 118255, 322995, 354765, 1442711, 4328133, 7213555, 21640665]

約数ペア:

[(1, 21640665), (3, 7213555), (5, 4328133), (15, 1442711), (61, 354765), (67, 322995), (183, 118255), (201, 107665), (305, 70953), (335, 64599), (353, 61305), (915, 23651), (1005, 21533), (1059, 20435), (1765, 12261), (4087, 5295)]