21086505

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1039}}^1$

素因数の和:1102

約数の個数: 48

約数和(自身を含む): 40884480

約数和(自身を除く): 19797975

約数列:

[1, 3, 5, 9, 11, 15, 33, 41, 45, 55, 99, 123, 165, 205, 369, 451, 495, 615, 1039, 1353, 1845, 2255, 3117, 4059, 5195, 6765, 9351, 11429, 15585, 20295, 34287, 42599, 46755, 57145, 102861, 127797, 171435, 212995, 383391, 468589, 514305, 638985, 1405767, 1916955, 2342945, 4217301, 7028835, 21086505]

約数ペア:

[(1, 21086505), (3, 7028835), (5, 4217301), (9, 2342945), (11, 1916955), (15, 1405767), (33, 638985), (41, 514305), (45, 468589), (55, 383391), (99, 212995), (123, 171435), (165, 127797), (205, 102861), (369, 57145), (451, 46755), (495, 42599), (615, 34287), (1039, 20295), (1353, 15585), (1845, 11429), (2255, 9351), (3117, 6765), (4059, 5195)]