21265264

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:397

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21232016

約数列:

[1, 2, 4, 8, 16, 67, 83, 134, 166, 239, 268, 332, 478, 536, 664, 956, 1072, 1328, 1912, 3824, 5561, 11122, 16013, 19837, 22244, 32026, 39674, 44488, 64052, 79348, 88976, 128104, 158696, 256208, 317392, 1329079, 2658158, 5316316, 10632632, 21265264]

約数ペア:

[(1, 21265264), (2, 10632632), (4, 5316316), (8, 2658158), (16, 1329079), (67, 317392), (83, 256208), (134, 158696), (166, 128104), (239, 88976), (268, 79348), (332, 64052), (478, 44488), (536, 39674), (664, 32026), (956, 22244), (1072, 19837), (1328, 16013), (1912, 11122), (3824, 5561)]