18721745

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{599}}^1$

素因数の和:677

約数の個数: 32

約数和(自身を含む): 27648000

約数和(自身を除く): 8926255

約数列:

[1, 5, 7, 19, 35, 47, 95, 133, 235, 329, 599, 665, 893, 1645, 2995, 4193, 4465, 6251, 11381, 20965, 28153, 31255, 56905, 79667, 140765, 197071, 398335, 534907, 985355, 2674535, 3744349, 18721745]

約数ペア:

[(1, 18721745), (5, 3744349), (7, 2674535), (19, 985355), (35, 534907), (47, 398335), (95, 197071), (133, 140765), (235, 79667), (329, 56905), (599, 31255), (665, 28153), (893, 20965), (1645, 11381), (2995, 6251), (4193, 4465)]