21129140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55603}}^1$

素因数の和:55631

約数の個数: 24

約数和(自身を含む): 46707360

約数和(自身を除く): 25578220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55603, 111206, 222412, 278015, 556030, 1056457, 1112060, 2112914, 4225828, 5282285, 10564570, 21129140]

約数ペア:

[(1, 21129140), (2, 10564570), (4, 5282285), (5, 4225828), (10, 2112914), (19, 1112060), (20, 1056457), (38, 556030), (76, 278015), (95, 222412), (190, 111206), (380, 55603)]