21000259998

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^1\times {\mathrm{8513}}^1\times {\mathrm{7213}}^1$

素因数の和:15753

約数の個数: 48

約数和(自身を含む): 47907596880

約数和(自身を除く): 26907336882

約数列:

[1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 342, 7213, 8513, 14426, 17026, 21639, 25539, 43278, 51078, 64917, 76617, 129834, 137047, 153234, 161747, 274094, 323494, 411141, 485241, 822282, 970482, 1233423, 1455723, 2466846, 2911446, 61404269, 122808538, 184212807, 368425614, 552638421, 1105276842, 1166681111, 2333362222, 3500043333, 7000086666, 10500129999, 21000259998]

約数ペア:

[(1, 21000259998), (2, 10500129999), (3, 7000086666), (6, 3500043333), (9, 2333362222), (18, 1166681111), (19, 1105276842), (38, 552638421), (57, 368425614), (114, 184212807), (171, 122808538), (342, 61404269), (7213, 2911446), (8513, 2466846), (14426, 1455723), (17026, 1233423), (21639, 970482), (25539, 822282), (43278, 485241), (51078, 411141), (64917, 323494), (76617, 274094), (129834, 161747), (137047, 153234)]