21396656

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{769}}^1$

素因数の和:861

約数の個数: 40

約数和(自身を含む): 43538880

約数和(自身を除く): 22142224

約数列:

[1, 2, 4, 8, 16, 37, 47, 74, 94, 148, 188, 296, 376, 592, 752, 769, 1538, 1739, 3076, 3478, 6152, 6956, 12304, 13912, 27824, 28453, 36143, 56906, 72286, 113812, 144572, 227624, 289144, 455248, 578288, 1337291, 2674582, 5349164, 10698328, 21396656]

約数ペア:

[(1, 21396656), (2, 10698328), (4, 5349164), (8, 2674582), (16, 1337291), (37, 578288), (47, 455248), (74, 289144), (94, 227624), (148, 144572), (188, 113812), (296, 72286), (376, 56906), (592, 36143), (752, 28453), (769, 27824), (1538, 13912), (1739, 12304), (3076, 6956), (3478, 6152)]