20504925

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:347

約数の個数: 72

約数和(自身を含む): 43021056

約数和(自身を除く): 22516131

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 47, 63, 75, 105, 141, 175, 225, 235, 277, 315, 329, 423, 525, 705, 831, 987, 1175, 1385, 1575, 1645, 1939, 2115, 2493, 2961, 3525, 4155, 4935, 5817, 6925, 8225, 9695, 10575, 12465, 13019, 14805, 17451, 20775, 24675, 29085, 39057, 48475, 62325, 65095, 74025, 87255, 91133, 117171, 145425, 195285, 273399, 325475, 436275, 455665, 585855, 820197, 976425, 1366995, 2278325, 2929275, 4100985, 6834975, 20504925]

約数ペア:

[(1, 20504925), (3, 6834975), (5, 4100985), (7, 2929275), (9, 2278325), (15, 1366995), (21, 976425), (25, 820197), (35, 585855), (45, 455665), (47, 436275), (63, 325475), (75, 273399), (105, 195285), (141, 145425), (175, 117171), (225, 91133), (235, 87255), (277, 74025), (315, 65095), (329, 62325), (423, 48475), (525, 39057), (705, 29085), (831, 24675), (987, 20775), (1175, 17451), (1385, 14805), (1575, 13019), (1645, 12465), (1939, 10575), (2115, 9695), (2493, 8225), (2961, 6925), (3525, 5817), (4155, 4935)]