20686715

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{229}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 29808000

約数和(自身を除く): 9121285

約数列:

[1, 5, 7, 29, 35, 89, 145, 203, 229, 445, 623, 1015, 1145, 1603, 2581, 3115, 6641, 8015, 12905, 18067, 20381, 33205, 46487, 90335, 101905, 142667, 232435, 591049, 713335, 2955245, 4137343, 20686715]

約数ペア:

[(1, 20686715), (5, 4137343), (7, 2955245), (29, 713335), (35, 591049), (89, 232435), (145, 142667), (203, 101905), (229, 90335), (445, 46487), (623, 33205), (1015, 20381), (1145, 18067), (1603, 12905), (2581, 8015), (3115, 6641)]