21277935

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2179}}^1$

素因数の和:2228

約数の個数: 48

約数和(自身を含む): 43530240

約数和(自身を除く): 22252305

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 93, 105, 155, 217, 279, 315, 465, 651, 1085, 1395, 1953, 2179, 3255, 6537, 9765, 10895, 15253, 19611, 32685, 45759, 67549, 76265, 98055, 137277, 202647, 228795, 337745, 472843, 607941, 686385, 1013235, 1418529, 2364215, 3039705, 4255587, 7092645, 21277935]

約数ペア:

[(1, 21277935), (3, 7092645), (5, 4255587), (7, 3039705), (9, 2364215), (15, 1418529), (21, 1013235), (31, 686385), (35, 607941), (45, 472843), (63, 337745), (93, 228795), (105, 202647), (155, 137277), (217, 98055), (279, 76265), (315, 67549), (465, 45759), (651, 32685), (1085, 19611), (1395, 15253), (1953, 10895), (2179, 9765), (3255, 6537)]