21336928

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:335

約数の個数: 48

約数和(自身を含む): 43956864

約数和(自身を除く): 22619936

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 124, 137, 157, 248, 274, 314, 496, 548, 628, 992, 1096, 1256, 2192, 2512, 4247, 4384, 4867, 5024, 8494, 9734, 16988, 19468, 21509, 33976, 38936, 43018, 67952, 77872, 86036, 135904, 155744, 172072, 344144, 666779, 688288, 1333558, 2667116, 5334232, 10668464, 21336928]

約数ペア:

[(1, 21336928), (2, 10668464), (4, 5334232), (8, 2667116), (16, 1333558), (31, 688288), (32, 666779), (62, 344144), (124, 172072), (137, 155744), (157, 135904), (248, 86036), (274, 77872), (314, 67952), (496, 43018), (548, 38936), (628, 33976), (992, 21509), (1096, 19468), (1256, 16988), (2192, 9734), (2512, 8494), (4247, 5024), (4384, 4867)]