21298528

素因数分解:

$2^5\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{389}}^1$

素因数の和:487

約数の個数: 48

約数和(自身を含む): 44226000

約数和(自身を除く): 22927472

約数列:

[1, 2, 4, 8, 16, 29, 32, 58, 59, 116, 118, 232, 236, 389, 464, 472, 778, 928, 944, 1556, 1711, 1888, 3112, 3422, 6224, 6844, 11281, 12448, 13688, 22562, 22951, 27376, 45124, 45902, 54752, 90248, 91804, 180496, 183608, 360992, 367216, 665579, 734432, 1331158, 2662316, 5324632, 10649264, 21298528]

約数ペア:

[(1, 21298528), (2, 10649264), (4, 5324632), (8, 2662316), (16, 1331158), (29, 734432), (32, 665579), (58, 367216), (59, 360992), (116, 183608), (118, 180496), (232, 91804), (236, 90248), (389, 54752), (464, 45902), (472, 45124), (778, 27376), (928, 22951), (944, 22562), (1556, 13688), (1711, 12448), (1888, 11281), (3112, 6844), (3422, 6224)]