81780015

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1\times {\mathrm{443}}^1$

素因数の和:879

約数の個数: 32

約数和(自身を含む): 135714816

約数和(自身を除く): 53934801

約数列:

[1, 3, 5, 15, 31, 93, 155, 397, 443, 465, 1191, 1329, 1985, 2215, 5955, 6645, 12307, 13733, 36921, 41199, 61535, 68665, 175871, 184605, 205995, 527613, 879355, 2638065, 5452001, 16356003, 27260005, 81780015]

約数ペア:

[(1, 81780015), (3, 27260005), (5, 16356003), (15, 5452001), (31, 2638065), (93, 879355), (155, 527613), (397, 205995), (443, 184605), (465, 175871), (1191, 68665), (1329, 61535), (1985, 41199), (2215, 36921), (5955, 13733), (6645, 12307)]