21038778

素因数分解:

$2^1\times 3^4\times {\mathrm{61}}^1\times {\mathrm{2129}}^1$

素因数の和:2204

約数の個数: 40

約数和(自身を含む): 47937780

約数和(自身を除く): 26899002

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 61, 81, 122, 162, 183, 366, 549, 1098, 1647, 2129, 3294, 4258, 4941, 6387, 9882, 12774, 19161, 38322, 57483, 114966, 129869, 172449, 259738, 344898, 389607, 779214, 1168821, 2337642, 3506463, 7012926, 10519389, 21038778]

約数ペア:

[(1, 21038778), (2, 10519389), (3, 7012926), (6, 3506463), (9, 2337642), (18, 1168821), (27, 779214), (54, 389607), (61, 344898), (81, 259738), (122, 172449), (162, 129869), (183, 114966), (366, 57483), (549, 38322), (1098, 19161), (1647, 12774), (2129, 9882), (3294, 6387), (4258, 4941)]