1815980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:170

約数の個数: 48

約数和(自身を含む): 4112640

約数和(自身を除く): 2296660

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 101, 116, 124, 145, 155, 202, 290, 310, 404, 505, 580, 620, 899, 1010, 1798, 2020, 2929, 3131, 3596, 4495, 5858, 6262, 8990, 11716, 12524, 14645, 15655, 17980, 29290, 31310, 58580, 62620, 90799, 181598, 363196, 453995, 907990, 1815980]

約数ペア:

[(1, 1815980), (2, 907990), (4, 453995), (5, 363196), (10, 181598), (20, 90799), (29, 62620), (31, 58580), (58, 31310), (62, 29290), (101, 17980), (116, 15655), (124, 14645), (145, 12524), (155, 11716), (202, 8990), (290, 6262), (310, 5858), (404, 4495), (505, 3596), (580, 3131), (620, 2929), (899, 2020), (1010, 1798)]