19998615

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{13}}^2\times {\mathrm{23}}^1$

素因数の和:78

約数の個数: 96

約数和(自身を含む): 42163200

約数和(自身を除く): 22164585

約数列:

[1, 3, 5, 7, 13, 15, 21, 23, 35, 39, 49, 65, 69, 91, 105, 115, 147, 161, 169, 195, 245, 273, 299, 343, 345, 455, 483, 507, 637, 735, 805, 845, 897, 1029, 1127, 1183, 1365, 1495, 1715, 1911, 2093, 2415, 2535, 3185, 3381, 3549, 3887, 4459, 4485, 5145, 5635, 5915, 6279, 7889, 8281, 9555, 10465, 11661, 13377, 14651, 16905, 17745, 19435, 22295, 23667, 24843, 27209, 31395, 39445, 41405, 43953, 57967, 58305, 66885, 73255, 81627, 102557, 118335, 124215, 136045, 173901, 190463, 219765, 289835, 307671, 408135, 512785, 571389, 869505, 952315, 1333241, 1538355, 2856945, 3999723, 6666205, 19998615]

約数ペア:

[(1, 19998615), (3, 6666205), (5, 3999723), (7, 2856945), (13, 1538355), (15, 1333241), (21, 952315), (23, 869505), (35, 571389), (39, 512785), (49, 408135), (65, 307671), (69, 289835), (91, 219765), (105, 190463), (115, 173901), (147, 136045), (161, 124215), (169, 118335), (195, 102557), (245, 81627), (273, 73255), (299, 66885), (343, 58305), (345, 57967), (455, 43953), (483, 41405), (507, 39445), (637, 31395), (735, 27209), (805, 24843), (845, 23667), (897, 22295), (1029, 19435), (1127, 17745), (1183, 16905), (1365, 14651), (1495, 13377), (1715, 11661), (1911, 10465), (2093, 9555), (2415, 8281), (2535, 7889), (3185, 6279), (3381, 5915), (3549, 5635), (3887, 5145), (4459, 4485)]