21128148

素因数分解:

$2^2\times 3^3\times {\mathrm{83}}^1\times {\mathrm{2357}}^1$

素因数の和:2453

約数の個数: 48

約数和(自身を含む): 55460160

約数和(自身を除く): 34332012

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 83, 108, 166, 249, 332, 498, 747, 996, 1494, 2241, 2357, 2988, 4482, 4714, 7071, 8964, 9428, 14142, 21213, 28284, 42426, 63639, 84852, 127278, 195631, 254556, 391262, 586893, 782524, 1173786, 1760679, 2347572, 3521358, 5282037, 7042716, 10564074, 21128148]

約数ペア:

[(1, 21128148), (2, 10564074), (3, 7042716), (4, 5282037), (6, 3521358), (9, 2347572), (12, 1760679), (18, 1173786), (27, 782524), (36, 586893), (54, 391262), (83, 254556), (108, 195631), (166, 127278), (249, 84852), (332, 63639), (498, 42426), (747, 28284), (996, 21213), (1494, 14142), (2241, 9428), (2357, 8964), (2988, 7071), (4482, 4714)]