21965818

素因数分解:

$2^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:235

約数の個数: 48

約数和(自身を含む): 40629600

約数和(自身を除く): 18663782

約数列:

[1, 2, 7, 14, 29, 49, 58, 59, 98, 118, 131, 203, 262, 406, 413, 826, 917, 1421, 1711, 1834, 2842, 2891, 3422, 3799, 5782, 6419, 7598, 7729, 11977, 12838, 15458, 23954, 26593, 53186, 54103, 83839, 108206, 167678, 186151, 224141, 372302, 378721, 448282, 757442, 1568987, 3137974, 10982909, 21965818]

約数ペア:

[(1, 21965818), (2, 10982909), (7, 3137974), (14, 1568987), (29, 757442), (49, 448282), (58, 378721), (59, 372302), (98, 224141), (118, 186151), (131, 167678), (203, 108206), (262, 83839), (406, 54103), (413, 53186), (826, 26593), (917, 23954), (1421, 15458), (1711, 12838), (1834, 11977), (2842, 7729), (2891, 7598), (3422, 6419), (3799, 5782)]