20556978

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{419}}^1$

素因数の和:491

約数の個数: 64

約数和(自身を含む): 48263040

約数和(自身を除く): 27706062

約数列:

[1, 2, 3, 6, 13, 17, 26, 34, 37, 39, 51, 74, 78, 102, 111, 221, 222, 419, 442, 481, 629, 663, 838, 962, 1257, 1258, 1326, 1443, 1887, 2514, 2886, 3774, 5447, 7123, 8177, 10894, 14246, 15503, 16341, 16354, 21369, 24531, 31006, 32682, 42738, 46509, 49062, 92599, 93018, 185198, 201539, 263551, 277797, 403078, 527102, 555594, 604617, 790653, 1209234, 1581306, 3426163, 6852326, 10278489, 20556978]

約数ペア:

[(1, 20556978), (2, 10278489), (3, 6852326), (6, 3426163), (13, 1581306), (17, 1209234), (26, 790653), (34, 604617), (37, 555594), (39, 527102), (51, 403078), (74, 277797), (78, 263551), (102, 201539), (111, 185198), (221, 93018), (222, 92599), (419, 49062), (442, 46509), (481, 42738), (629, 32682), (663, 31006), (838, 24531), (962, 21369), (1257, 16354), (1258, 16341), (1326, 15503), (1443, 14246), (1887, 10894), (2514, 8177), (2886, 7123), (3774, 5447)]