21422320

素因数分解:

$2^4\times 5^1\times {\mathrm{331}}^1\times {\mathrm{809}}^1$

素因数の和:1153

約数の個数: 40

約数和(自身を含む): 50019120

約数和(自身を除く): 28596800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 331, 662, 809, 1324, 1618, 1655, 2648, 3236, 3310, 4045, 5296, 6472, 6620, 8090, 12944, 13240, 16180, 26480, 32360, 64720, 267779, 535558, 1071116, 1338895, 2142232, 2677790, 4284464, 5355580, 10711160, 21422320]

約数ペア:

[(1, 21422320), (2, 10711160), (4, 5355580), (5, 4284464), (8, 2677790), (10, 2142232), (16, 1338895), (20, 1071116), (40, 535558), (80, 267779), (331, 64720), (662, 32360), (809, 26480), (1324, 16180), (1618, 13240), (1655, 12944), (2648, 8090), (3236, 6620), (3310, 6472), (4045, 5296)]