21248865

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{349}}^1$

素因数の和:415

約数の個数: 64

約数和(自身を含む): 42336000

約数和(自身を除く): 21087135

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 41, 45, 55, 99, 123, 135, 165, 205, 297, 349, 369, 451, 495, 615, 1047, 1107, 1353, 1485, 1745, 1845, 2255, 3141, 3839, 4059, 5235, 5535, 6765, 9423, 11517, 12177, 14309, 15705, 19195, 20295, 34551, 42927, 47115, 57585, 60885, 71545, 103653, 128781, 157399, 172755, 214635, 386343, 472197, 518265, 643905, 786995, 1416591, 1931715, 2360985, 4249773, 7082955, 21248865]

約数ペア:

[(1, 21248865), (3, 7082955), (5, 4249773), (9, 2360985), (11, 1931715), (15, 1416591), (27, 786995), (33, 643905), (41, 518265), (45, 472197), (55, 386343), (99, 214635), (123, 172755), (135, 157399), (165, 128781), (205, 103653), (297, 71545), (349, 60885), (369, 57585), (451, 47115), (495, 42927), (615, 34551), (1047, 20295), (1107, 19195), (1353, 15705), (1485, 14309), (1745, 12177), (1845, 11517), (2255, 9423), (3141, 6765), (3839, 5535), (4059, 5235)]