20942680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4327}}^1$

素因数の和:4360

約数の個数: 48

約数和(自身を含む): 51806160

約数和(自身を除く): 30863480

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, 4327, 4840, 8654, 17308, 21635, 34616, 43270, 47597, 86540, 95194, 173080, 190388, 237985, 380776, 475970, 523567, 951940, 1047134, 1903880, 2094268, 2617835, 4188536, 5235670, 10471340, 20942680]

約数ペア:

[(1, 20942680), (2, 10471340), (4, 5235670), (5, 4188536), (8, 2617835), (10, 2094268), (11, 1903880), (20, 1047134), (22, 951940), (40, 523567), (44, 475970), (55, 380776), (88, 237985), (110, 190388), (121, 173080), (220, 95194), (242, 86540), (440, 47597), (484, 43270), (605, 34616), (968, 21635), (1210, 17308), (2420, 8654), (4327, 4840)]