213517820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{2351}}^1$

素因数の和:2618

約数の個数: 48

約数和(自身を含む): 474163200

約数和(自身を除く): 260645380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 239, 380, 478, 956, 1195, 2351, 2390, 4541, 4702, 4780, 9082, 9404, 11755, 18164, 22705, 23510, 44669, 45410, 47020, 89338, 90820, 178676, 223345, 446690, 561889, 893380, 1123778, 2247556, 2809445, 5618890, 10675891, 11237780, 21351782, 42703564, 53379455, 106758910, 213517820]

約数ペア:

[(1, 213517820), (2, 106758910), (4, 53379455), (5, 42703564), (10, 21351782), (19, 11237780), (20, 10675891), (38, 5618890), (76, 2809445), (95, 2247556), (190, 1123778), (239, 893380), (380, 561889), (478, 446690), (956, 223345), (1195, 178676), (2351, 90820), (2390, 89338), (4541, 47020), (4702, 45410), (4780, 44669), (9082, 23510), (9404, 22705), (11755, 18164)]