18880015

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 31104000

約数和(自身を除く): 12223985

約数列:

[1, 5, 7, 11, 19, 29, 35, 55, 77, 89, 95, 133, 145, 203, 209, 319, 385, 445, 551, 623, 665, 979, 1015, 1045, 1463, 1595, 1691, 2233, 2581, 2755, 3115, 3857, 4895, 6061, 6853, 7315, 8455, 11165, 11837, 12905, 18067, 18601, 19285, 28391, 30305, 34265, 42427, 49039, 59185, 90335, 93005, 130207, 141955, 198737, 212135, 245195, 343273, 539429, 651035, 993685, 1716365, 2697145, 3776003, 18880015]

約数ペア:

[(1, 18880015), (5, 3776003), (7, 2697145), (11, 1716365), (19, 993685), (29, 651035), (35, 539429), (55, 343273), (77, 245195), (89, 212135), (95, 198737), (133, 141955), (145, 130207), (203, 93005), (209, 90335), (319, 59185), (385, 49039), (445, 42427), (551, 34265), (623, 30305), (665, 28391), (979, 19285), (1015, 18601), (1045, 18067), (1463, 12905), (1595, 11837), (1691, 11165), (2233, 8455), (2581, 7315), (2755, 6853), (3115, 6061), (3857, 4895)]