78358520

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:408

約数の個数: 64

約数和(自身を含む): 180835200

約数和(自身を除く): 102476680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 137, 158, 181, 274, 316, 362, 395, 548, 632, 685, 724, 790, 905, 1096, 1370, 1448, 1580, 1810, 2740, 3160, 3620, 5480, 7240, 10823, 14299, 21646, 24797, 28598, 43292, 49594, 54115, 57196, 71495, 86584, 99188, 108230, 114392, 123985, 142990, 198376, 216460, 247970, 285980, 432920, 495940, 571960, 991880, 1958963, 3917926, 7835852, 9794815, 15671704, 19589630, 39179260, 78358520]

約数ペア:

[(1, 78358520), (2, 39179260), (4, 19589630), (5, 15671704), (8, 9794815), (10, 7835852), (20, 3917926), (40, 1958963), (79, 991880), (137, 571960), (158, 495940), (181, 432920), (274, 285980), (316, 247970), (362, 216460), (395, 198376), (548, 142990), (632, 123985), (685, 114392), (724, 108230), (790, 99188), (905, 86584), (1096, 71495), (1370, 57196), (1448, 54115), (1580, 49594), (1810, 43292), (2740, 28598), (3160, 24797), (3620, 21646), (5480, 14299), (7240, 10823)]