21315645

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{439}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 19044675

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 83, 117, 195, 249, 415, 439, 585, 747, 1079, 1245, 1317, 2195, 3237, 3735, 3951, 5395, 5707, 6585, 9711, 16185, 17121, 19755, 28535, 36437, 48555, 51363, 85605, 109311, 182185, 256815, 327933, 473681, 546555, 1421043, 1639665, 2368405, 4263129, 7105215, 21315645]

約数ペア:

[(1, 21315645), (3, 7105215), (5, 4263129), (9, 2368405), (13, 1639665), (15, 1421043), (39, 546555), (45, 473681), (65, 327933), (83, 256815), (117, 182185), (195, 109311), (249, 85605), (415, 51363), (439, 48555), (585, 36437), (747, 28535), (1079, 19755), (1245, 17121), (1317, 16185), (2195, 9711), (3237, 6585), (3735, 5707), (3951, 5395)]