21720028

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{3313}}^1$

素因数の和:3477

約数の個数: 24

約数和(自身を含む): 41756400

約数和(自身を除く): 20036372

約数列:

[1, 2, 4, 11, 22, 44, 149, 298, 596, 1639, 3278, 3313, 6556, 6626, 13252, 36443, 72886, 145772, 493637, 987274, 1974548, 5430007, 10860014, 21720028]

約数ペア:

[(1, 21720028), (2, 10860014), (4, 5430007), (11, 1974548), (22, 987274), (44, 493637), (149, 145772), (298, 72886), (596, 36443), (1639, 13252), (3278, 6626), (3313, 6556)]