21755838

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:289

約数の個数: 64

約数和(自身を含む): 49900032

約数和(自身を除く): 28144194

約数列:

[1, 2, 3, 6, 13, 23, 26, 39, 46, 67, 69, 78, 134, 138, 181, 201, 299, 362, 402, 543, 598, 871, 897, 1086, 1541, 1742, 1794, 2353, 2613, 3082, 4163, 4623, 4706, 5226, 7059, 8326, 9246, 12127, 12489, 14118, 20033, 24254, 24978, 36381, 40066, 54119, 60099, 72762, 108238, 120198, 157651, 162357, 278921, 315302, 324714, 472953, 557842, 836763, 945906, 1673526, 3625973, 7251946, 10877919, 21755838]

約数ペア:

[(1, 21755838), (2, 10877919), (3, 7251946), (6, 3625973), (13, 1673526), (23, 945906), (26, 836763), (39, 557842), (46, 472953), (67, 324714), (69, 315302), (78, 278921), (134, 162357), (138, 157651), (181, 120198), (201, 108238), (299, 72762), (362, 60099), (402, 54119), (543, 40066), (598, 36381), (871, 24978), (897, 24254), (1086, 20033), (1541, 14118), (1742, 12489), (1794, 12127), (2353, 9246), (2613, 8326), (3082, 7059), (4163, 5226), (4623, 4706)]