21103540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{463}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 46303488

約数和(自身を除く): 25199948

約数列:

[1, 2, 4, 5, 10, 20, 43, 53, 86, 106, 172, 212, 215, 265, 430, 463, 530, 860, 926, 1060, 1852, 2279, 2315, 4558, 4630, 9116, 9260, 11395, 19909, 22790, 24539, 39818, 45580, 49078, 79636, 98156, 99545, 122695, 199090, 245390, 398180, 490780, 1055177, 2110354, 4220708, 5275885, 10551770, 21103540]

約数ペア:

[(1, 21103540), (2, 10551770), (4, 5275885), (5, 4220708), (10, 2110354), (20, 1055177), (43, 490780), (53, 398180), (86, 245390), (106, 199090), (172, 122695), (212, 99545), (215, 98156), (265, 79636), (430, 49078), (463, 45580), (530, 39818), (860, 24539), (926, 22790), (1060, 19909), (1852, 11395), (2279, 9260), (2315, 9116), (4558, 4630)]