21123990

素因数分解:

$2^1\times 3^5\times 5^1\times {\mathrm{8693}}^1$

素因数の和:8715

約数の個数: 48

約数和(自身を含む): 56963088

約数和(自身を除く): 35839098

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 243, 270, 405, 486, 810, 1215, 2430, 8693, 17386, 26079, 43465, 52158, 78237, 86930, 130395, 156474, 234711, 260790, 391185, 469422, 704133, 782370, 1173555, 1408266, 2112399, 2347110, 3520665, 4224798, 7041330, 10561995, 21123990]

約数ペア:

[(1, 21123990), (2, 10561995), (3, 7041330), (5, 4224798), (6, 3520665), (9, 2347110), (10, 2112399), (15, 1408266), (18, 1173555), (27, 782370), (30, 704133), (45, 469422), (54, 391185), (81, 260790), (90, 234711), (135, 156474), (162, 130395), (243, 86930), (270, 78237), (405, 52158), (486, 43465), (810, 26079), (1215, 17386), (2430, 8693)]