21386960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{211}}^1$

素因数の和:412

約数の個数: 80

約数和(自身を含む): 57412992

約数和(自身を除く): 36026032

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 181, 211, 280, 362, 422, 560, 724, 844, 905, 1055, 1267, 1448, 1477, 1688, 1810, 2110, 2534, 2896, 2954, 3376, 3620, 4220, 5068, 5908, 6335, 7240, 7385, 8440, 10136, 11816, 12670, 14480, 14770, 16880, 20272, 23632, 25340, 29540, 38191, 50680, 59080, 76382, 101360, 118160, 152764, 190955, 267337, 305528, 381910, 534674, 611056, 763820, 1069348, 1336685, 1527640, 2138696, 2673370, 3055280, 4277392, 5346740, 10693480, 21386960]

約数ペア:

[(1, 21386960), (2, 10693480), (4, 5346740), (5, 4277392), (7, 3055280), (8, 2673370), (10, 2138696), (14, 1527640), (16, 1336685), (20, 1069348), (28, 763820), (35, 611056), (40, 534674), (56, 381910), (70, 305528), (80, 267337), (112, 190955), (140, 152764), (181, 118160), (211, 101360), (280, 76382), (362, 59080), (422, 50680), (560, 38191), (724, 29540), (844, 25340), (905, 23632), (1055, 20272), (1267, 16880), (1448, 14770), (1477, 14480), (1688, 12670), (1810, 11816), (2110, 10136), (2534, 8440), (2896, 7385), (2954, 7240), (3376, 6335), (3620, 5908), (4220, 5068)]