21540428

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^2$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 49970592

約数和(自身を除く): 28430164

約数列:

[1, 2, 4, 7, 13, 14, 17, 26, 28, 34, 52, 59, 68, 91, 118, 119, 182, 221, 236, 238, 364, 413, 442, 476, 767, 826, 884, 1003, 1534, 1547, 1652, 2006, 3068, 3094, 3481, 4012, 5369, 6188, 6962, 7021, 10738, 13039, 13924, 14042, 21476, 24367, 26078, 28084, 45253, 48734, 52156, 59177, 90506, 91273, 97468, 118354, 181012, 182546, 236708, 316771, 365092, 414239, 633542, 769301, 828478, 1267084, 1538602, 1656956, 3077204, 5385107, 10770214, 21540428]

約数ペア:

[(1, 21540428), (2, 10770214), (4, 5385107), (7, 3077204), (13, 1656956), (14, 1538602), (17, 1267084), (26, 828478), (28, 769301), (34, 633542), (52, 414239), (59, 365092), (68, 316771), (91, 236708), (118, 182546), (119, 181012), (182, 118354), (221, 97468), (236, 91273), (238, 90506), (364, 59177), (413, 52156), (442, 48734), (476, 45253), (767, 28084), (826, 26078), (884, 24367), (1003, 21476), (1534, 14042), (1547, 13924), (1652, 13039), (2006, 10738), (3068, 7021), (3094, 6962), (3481, 6188), (4012, 5369)]