18408663

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^3\times {\mathrm{19}}^1$

素因数の和:78

約数の個数: 72

約数和(自身を含む): 35271600

約数和(自身を除く): 16862937

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 49, 57, 63, 91, 117, 133, 147, 169, 171, 247, 273, 399, 441, 507, 637, 741, 819, 931, 1183, 1197, 1521, 1729, 1911, 2197, 2223, 2793, 3211, 3549, 5187, 5733, 6591, 8281, 8379, 9633, 10647, 12103, 15379, 15561, 19773, 22477, 24843, 28899, 36309, 41743, 46137, 67431, 74529, 107653, 108927, 125229, 138411, 157339, 202293, 292201, 322959, 375687, 472017, 876603, 968877, 1416051, 2045407, 2629809, 6136221, 18408663]

約数ペア:

[(1, 18408663), (3, 6136221), (7, 2629809), (9, 2045407), (13, 1416051), (19, 968877), (21, 876603), (39, 472017), (49, 375687), (57, 322959), (63, 292201), (91, 202293), (117, 157339), (133, 138411), (147, 125229), (169, 108927), (171, 107653), (247, 74529), (273, 67431), (399, 46137), (441, 41743), (507, 36309), (637, 28899), (741, 24843), (819, 22477), (931, 19773), (1183, 15561), (1197, 15379), (1521, 12103), (1729, 10647), (1911, 9633), (2197, 8379), (2223, 8281), (2793, 6591), (3211, 5733), (3549, 5187)]