21054760

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8629}}^1$

素因数の和:8701

約数の個数: 32

約数和(自身を含む): 48155400

約数和(自身を除く): 27100640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8629, 17258, 34516, 43145, 69032, 86290, 172580, 345160, 526369, 1052738, 2105476, 2631845, 4210952, 5263690, 10527380, 21054760]

約数ペア:

[(1, 21054760), (2, 10527380), (4, 5263690), (5, 4210952), (8, 2631845), (10, 2105476), (20, 1052738), (40, 526369), (61, 345160), (122, 172580), (244, 86290), (305, 69032), (488, 43145), (610, 34516), (1220, 17258), (2440, 8629)]