18770859

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:233

約数の個数: 40

約数和(自身を含む): 29707920

約数和(自身を除く): 10937061

約数列:

[1, 3, 9, 27, 29, 61, 81, 87, 131, 183, 261, 393, 549, 783, 1179, 1647, 1769, 2349, 3537, 3799, 4941, 5307, 7991, 10611, 11397, 15921, 23973, 34191, 47763, 71919, 102573, 143289, 215757, 231739, 307719, 647271, 695217, 2085651, 6256953, 18770859]

約数ペア:

[(1, 18770859), (3, 6256953), (9, 2085651), (27, 695217), (29, 647271), (61, 307719), (81, 231739), (87, 215757), (131, 143289), (183, 102573), (261, 71919), (393, 47763), (549, 34191), (783, 23973), (1179, 15921), (1647, 11397), (1769, 10611), (2349, 7991), (3537, 5307), (3799, 4941)]