21411225

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1$

素因数の和:279

約数の個数: 72

約数和(自身を含む): 43059744

約数和(自身を除く): 21648519

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 41, 45, 55, 75, 99, 123, 165, 205, 211, 225, 275, 369, 451, 495, 615, 633, 825, 1025, 1055, 1353, 1845, 1899, 2255, 2321, 2475, 3075, 3165, 4059, 5275, 6765, 6963, 8651, 9225, 9495, 11275, 11605, 15825, 20295, 20889, 25953, 33825, 34815, 43255, 47475, 58025, 77859, 95161, 101475, 104445, 129765, 174075, 216275, 285483, 389295, 475805, 522225, 648825, 856449, 1427415, 1946475, 2379025, 4282245, 7137075, 21411225]

約数ペア:

[(1, 21411225), (3, 7137075), (5, 4282245), (9, 2379025), (11, 1946475), (15, 1427415), (25, 856449), (33, 648825), (41, 522225), (45, 475805), (55, 389295), (75, 285483), (99, 216275), (123, 174075), (165, 129765), (205, 104445), (211, 101475), (225, 95161), (275, 77859), (369, 58025), (451, 47475), (495, 43255), (615, 34815), (633, 33825), (825, 25953), (1025, 20889), (1055, 20295), (1353, 15825), (1845, 11605), (1899, 11275), (2255, 9495), (2321, 9225), (2475, 8651), (3075, 6963), (3165, 6765), (4059, 5275)]