20959840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11909}}^1$

素因数の和:11935

約数の個数: 48

約数和(自身を含む): 54023760

約数和(自身を除く): 33063920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11909, 23818, 47636, 59545, 95272, 119090, 130999, 190544, 238180, 261998, 381088, 476360, 523996, 654995, 952720, 1047992, 1309990, 1905440, 2095984, 2619980, 4191968, 5239960, 10479920, 20959840]

約数ペア:

[(1, 20959840), (2, 10479920), (4, 5239960), (5, 4191968), (8, 2619980), (10, 2095984), (11, 1905440), (16, 1309990), (20, 1047992), (22, 952720), (32, 654995), (40, 523996), (44, 476360), (55, 381088), (80, 261998), (88, 238180), (110, 190544), (160, 130999), (176, 119090), (220, 95272), (352, 59545), (440, 47636), (880, 23818), (1760, 11909)]