28409240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 66528000

約数和(自身を除く): 38118760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 83, 86, 166, 172, 199, 215, 332, 344, 398, 415, 430, 664, 796, 830, 860, 995, 1592, 1660, 1720, 1990, 3320, 3569, 3980, 7138, 7960, 8557, 14276, 16517, 17114, 17845, 28552, 33034, 34228, 35690, 42785, 66068, 68456, 71380, 82585, 85570, 132136, 142760, 165170, 171140, 330340, 342280, 660680, 710231, 1420462, 2840924, 3551155, 5681848, 7102310, 14204620, 28409240]

約数ペア:

[(1, 28409240), (2, 14204620), (4, 7102310), (5, 5681848), (8, 3551155), (10, 2840924), (20, 1420462), (40, 710231), (43, 660680), (83, 342280), (86, 330340), (166, 171140), (172, 165170), (199, 142760), (215, 132136), (332, 85570), (344, 82585), (398, 71380), (415, 68456), (430, 66068), (664, 42785), (796, 35690), (830, 34228), (860, 33034), (995, 28552), (1592, 17845), (1660, 17114), (1720, 16517), (1990, 14276), (3320, 8557), (3569, 7960), (3980, 7138)]