20948960

素因数分解:

$2^5\times 5^1\times {\mathrm{311}}^1\times {\mathrm{421}}^1$

素因数の和:747

約数の個数: 48

約数和(自身を含む): 49768992

約数和(自身を除く): 28820032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 311, 421, 622, 842, 1244, 1555, 1684, 2105, 2488, 3110, 3368, 4210, 4976, 6220, 6736, 8420, 9952, 12440, 13472, 16840, 24880, 33680, 49760, 67360, 130931, 261862, 523724, 654655, 1047448, 1309310, 2094896, 2618620, 4189792, 5237240, 10474480, 20948960]

約数ペア:

[(1, 20948960), (2, 10474480), (4, 5237240), (5, 4189792), (8, 2618620), (10, 2094896), (16, 1309310), (20, 1047448), (32, 654655), (40, 523724), (80, 261862), (160, 130931), (311, 67360), (421, 49760), (622, 33680), (842, 24880), (1244, 16840), (1555, 13472), (1684, 12440), (2105, 9952), (2488, 8420), (3110, 6736), (3368, 6220), (4210, 4976)]