21698960

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:288

約数の個数: 80

約数和(自身を含む): 53568000

約数和(自身を除く): 31869040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 47, 58, 80, 94, 116, 145, 188, 199, 232, 235, 290, 376, 398, 464, 470, 580, 752, 796, 940, 995, 1160, 1363, 1592, 1880, 1990, 2320, 2726, 3184, 3760, 3980, 5452, 5771, 6815, 7960, 9353, 10904, 11542, 13630, 15920, 18706, 21808, 23084, 27260, 28855, 37412, 46168, 46765, 54520, 57710, 74824, 92336, 93530, 109040, 115420, 149648, 187060, 230840, 271237, 374120, 461680, 542474, 748240, 1084948, 1356185, 2169896, 2712370, 4339792, 5424740, 10849480, 21698960]

約数ペア:

[(1, 21698960), (2, 10849480), (4, 5424740), (5, 4339792), (8, 2712370), (10, 2169896), (16, 1356185), (20, 1084948), (29, 748240), (40, 542474), (47, 461680), (58, 374120), (80, 271237), (94, 230840), (116, 187060), (145, 149648), (188, 115420), (199, 109040), (232, 93530), (235, 92336), (290, 74824), (376, 57710), (398, 54520), (464, 46765), (470, 46168), (580, 37412), (752, 28855), (796, 27260), (940, 23084), (995, 21808), (1160, 18706), (1363, 15920), (1592, 13630), (1880, 11542), (1990, 10904), (2320, 9353), (2726, 7960), (3184, 6815), (3760, 5771), (3980, 5452)]