21049020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{337}}^1\times {\mathrm{347}}^1$

素因数の和:699

約数の個数: 72

約数和(自身を含む): 64222704

約数和(自身を除く): 43173684

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 337, 347, 674, 694, 1011, 1041, 1348, 1388, 1685, 1735, 2022, 2082, 3033, 3123, 3370, 3470, 4044, 4164, 5055, 5205, 6066, 6246, 6740, 6940, 10110, 10410, 12132, 12492, 15165, 15615, 20220, 20820, 30330, 31230, 60660, 62460, 116939, 233878, 350817, 467756, 584695, 701634, 1052451, 1169390, 1403268, 1754085, 2104902, 2338780, 3508170, 4209804, 5262255, 7016340, 10524510, 21049020]

約数ペア:

[(1, 21049020), (2, 10524510), (3, 7016340), (4, 5262255), (5, 4209804), (6, 3508170), (9, 2338780), (10, 2104902), (12, 1754085), (15, 1403268), (18, 1169390), (20, 1052451), (30, 701634), (36, 584695), (45, 467756), (60, 350817), (90, 233878), (180, 116939), (337, 62460), (347, 60660), (674, 31230), (694, 30330), (1011, 20820), (1041, 20220), (1348, 15615), (1388, 15165), (1685, 12492), (1735, 12132), (2022, 10410), (2082, 10110), (3033, 6940), (3123, 6740), (3370, 6246), (3470, 6066), (4044, 5205), (4164, 5055)]