21405618

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{5381}}^1$

素因数の和:5419

約数の個数: 48

約数和(自身を含む): 52894296

約数和(自身を除く): 31488678

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 34, 39, 51, 78, 102, 117, 153, 221, 234, 306, 442, 663, 1326, 1989, 3978, 5381, 10762, 16143, 32286, 48429, 69953, 91477, 96858, 139906, 182954, 209859, 274431, 419718, 548862, 629577, 823293, 1189201, 1259154, 1646586, 2378402, 3567603, 7135206, 10702809, 21405618]

約数ペア:

[(1, 21405618), (2, 10702809), (3, 7135206), (6, 3567603), (9, 2378402), (13, 1646586), (17, 1259154), (18, 1189201), (26, 823293), (34, 629577), (39, 548862), (51, 419718), (78, 274431), (102, 209859), (117, 182954), (153, 139906), (221, 96858), (234, 91477), (306, 69953), (442, 48429), (663, 32286), (1326, 16143), (1989, 10762), (3978, 5381)]