18387915

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{709}}^1$

素因数の和:756

約数の個数: 64

約数和(自身を含む): 38169600

約数和(自身を除く): 19781685

約数列:

[1, 3, 5, 7, 13, 15, 19, 21, 35, 39, 57, 65, 91, 95, 105, 133, 195, 247, 273, 285, 399, 455, 665, 709, 741, 1235, 1365, 1729, 1995, 2127, 3545, 3705, 4963, 5187, 8645, 9217, 10635, 13471, 14889, 24815, 25935, 27651, 40413, 46085, 64519, 67355, 74445, 94297, 138255, 175123, 193557, 202065, 282891, 322595, 471485, 525369, 875615, 967785, 1225861, 1414455, 2626845, 3677583, 6129305, 18387915]

約数ペア:

[(1, 18387915), (3, 6129305), (5, 3677583), (7, 2626845), (13, 1414455), (15, 1225861), (19, 967785), (21, 875615), (35, 525369), (39, 471485), (57, 322595), (65, 282891), (91, 202065), (95, 193557), (105, 175123), (133, 138255), (195, 94297), (247, 74445), (273, 67355), (285, 64519), (399, 46085), (455, 40413), (665, 27651), (709, 25935), (741, 24815), (1235, 14889), (1365, 13471), (1729, 10635), (1995, 9217), (2127, 8645), (3545, 5187), (3705, 4963)]