21178472

素因数分解:

$2^3\times 7^1\times {\mathrm{509}}^1\times {\mathrm{743}}^1$

素因数の和:1265

約数の個数: 32

約数和(自身を含む): 45532800

約数和(自身を除く): 24354328

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 509, 743, 1018, 1486, 2036, 2972, 3563, 4072, 5201, 5944, 7126, 10402, 14252, 20804, 28504, 41608, 378187, 756374, 1512748, 2647309, 3025496, 5294618, 10589236, 21178472]

約数ペア:

[(1, 21178472), (2, 10589236), (4, 5294618), (7, 3025496), (8, 2647309), (14, 1512748), (28, 756374), (56, 378187), (509, 41608), (743, 28504), (1018, 20804), (1486, 14252), (2036, 10402), (2972, 7126), (3563, 5944), (4072, 5201)]