20544800

素因数分解:

$2^5\times 5^2\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:502

約数の個数: 72

約数和(自身を含む): 51098292

約数和(自身を除く): 30553492

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 61, 80, 100, 122, 160, 200, 244, 305, 400, 421, 488, 610, 800, 842, 976, 1220, 1525, 1684, 1952, 2105, 2440, 3050, 3368, 4210, 4880, 6100, 6736, 8420, 9760, 10525, 12200, 13472, 16840, 21050, 24400, 25681, 33680, 42100, 48800, 51362, 67360, 84200, 102724, 128405, 168400, 205448, 256810, 336800, 410896, 513620, 642025, 821792, 1027240, 1284050, 2054480, 2568100, 4108960, 5136200, 10272400, 20544800]

約数ペア:

[(1, 20544800), (2, 10272400), (4, 5136200), (5, 4108960), (8, 2568100), (10, 2054480), (16, 1284050), (20, 1027240), (25, 821792), (32, 642025), (40, 513620), (50, 410896), (61, 336800), (80, 256810), (100, 205448), (122, 168400), (160, 128405), (200, 102724), (244, 84200), (305, 67360), (400, 51362), (421, 48800), (488, 42100), (610, 33680), (800, 25681), (842, 24400), (976, 21050), (1220, 16840), (1525, 13472), (1684, 12200), (1952, 10525), (2105, 9760), (2440, 8420), (3050, 6736), (3368, 6100), (4210, 4880)]