21003890

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51229}}^1$

素因数の和:51277

約数の個数: 16

約数和(自身を含む): 38729880

約数和(自身を除く): 17725990

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51229, 102458, 256145, 512290, 2100389, 4200778, 10501945, 21003890]

約数ペア:

[(1, 21003890), (2, 10501945), (5, 4200778), (10, 2100389), (41, 512290), (82, 256145), (205, 102458), (410, 51229)]