21189826

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{2153}}^1$

素因数の和:2218

約数の個数: 32

約数和(自身を含む): 39288960

約数和(自身を除く): 18099134

約数列:

[1, 2, 7, 14, 19, 37, 38, 74, 133, 259, 266, 518, 703, 1406, 2153, 4306, 4921, 9842, 15071, 30142, 40907, 79661, 81814, 159322, 286349, 557627, 572698, 1115254, 1513559, 3027118, 10594913, 21189826]

約数ペア:

[(1, 21189826), (2, 10594913), (7, 3027118), (14, 1513559), (19, 1115254), (37, 572698), (38, 557627), (74, 286349), (133, 159322), (259, 81814), (266, 79661), (518, 40907), (703, 30142), (1406, 15071), (2153, 9842), (4306, 4921)]