20758760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4289}}^1$

素因数の和:4322

約数の個数: 48

約数和(自身を含む): 51351300

約数和(自身を除く): 30592540

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4289, 4840, 8578, 17156, 21445, 34312, 42890, 47179, 85780, 94358, 171560, 188716, 235895, 377432, 471790, 518969, 943580, 1037938, 1887160, 2075876, 2594845, 4151752, 5189690, 10379380, 20758760]

約数ペア:

[(1, 20758760), (2, 10379380), (4, 5189690), (5, 4151752), (8, 2594845), (10, 2075876), (11, 1887160), (20, 1037938), (22, 943580), (40, 518969), (44, 471790), (55, 377432), (88, 235895), (110, 188716), (121, 171560), (220, 94358), (242, 85780), (440, 47179), (484, 42890), (605, 34312), (968, 21445), (1210, 17156), (2420, 8578), (4289, 4840)]