20965580

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1\times {\mathrm{107}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 45341856

約数和(自身を除く): 24376276

約数列:

[1, 2, 4, 5, 10, 20, 97, 101, 107, 194, 202, 214, 388, 404, 428, 485, 505, 535, 970, 1010, 1070, 1940, 2020, 2140, 9797, 10379, 10807, 19594, 20758, 21614, 39188, 41516, 43228, 48985, 51895, 54035, 97970, 103790, 108070, 195940, 207580, 216140, 1048279, 2096558, 4193116, 5241395, 10482790, 20965580]

約数ペア:

[(1, 20965580), (2, 10482790), (4, 5241395), (5, 4193116), (10, 2096558), (20, 1048279), (97, 216140), (101, 207580), (107, 195940), (194, 108070), (202, 103790), (214, 97970), (388, 54035), (404, 51895), (428, 48985), (485, 43228), (505, 41516), (535, 39188), (970, 21614), (1010, 20758), (1070, 19594), (1940, 10807), (2020, 10379), (2140, 9797)]