21559725

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{281}}^1$

素因数の和:339

約数の個数: 72

約数和(自身を含む): 43640064

約数和(自身を除く): 22080339

約数列:

[1, 3, 5, 9, 11, 15, 25, 31, 33, 45, 55, 75, 93, 99, 155, 165, 225, 275, 279, 281, 341, 465, 495, 775, 825, 843, 1023, 1395, 1405, 1705, 2325, 2475, 2529, 3069, 3091, 4215, 5115, 6975, 7025, 8525, 8711, 9273, 12645, 15345, 15455, 21075, 25575, 26133, 27819, 43555, 46365, 63225, 76725, 77275, 78399, 95821, 130665, 139095, 217775, 231825, 287463, 391995, 479105, 653325, 695475, 862389, 1437315, 1959975, 2395525, 4311945, 7186575, 21559725]

約数ペア:

[(1, 21559725), (3, 7186575), (5, 4311945), (9, 2395525), (11, 1959975), (15, 1437315), (25, 862389), (31, 695475), (33, 653325), (45, 479105), (55, 391995), (75, 287463), (93, 231825), (99, 217775), (155, 139095), (165, 130665), (225, 95821), (275, 78399), (279, 77275), (281, 76725), (341, 63225), (465, 46365), (495, 43555), (775, 27819), (825, 26133), (843, 25575), (1023, 21075), (1395, 15455), (1405, 15345), (1705, 12645), (2325, 9273), (2475, 8711), (2529, 8525), (3069, 7025), (3091, 6975), (4215, 5115)]