21444560

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8647}}^1$

素因数の和:8691

約数の個数: 40

約数和(自身を含む): 51472896

約数和(自身を除く): 30028336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8647, 17294, 34588, 43235, 69176, 86470, 138352, 172940, 268057, 345880, 536114, 691760, 1072228, 1340285, 2144456, 2680570, 4288912, 5361140, 10722280, 21444560]

約数ペア:

[(1, 21444560), (2, 10722280), (4, 5361140), (5, 4288912), (8, 2680570), (10, 2144456), (16, 1340285), (20, 1072228), (31, 691760), (40, 536114), (62, 345880), (80, 268057), (124, 172940), (155, 138352), (248, 86470), (310, 69176), (496, 43235), (620, 34588), (1240, 17294), (2480, 8647)]