20353480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{463}}^1$

素因数の和:638

約数の個数: 64

約数和(自身を含む): 52784640

約数和(自身を除く): 32431160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 463, 628, 785, 926, 1099, 1256, 1570, 1852, 2198, 2315, 3140, 3241, 3704, 4396, 4630, 5495, 6280, 6482, 8792, 9260, 10990, 12964, 16205, 18520, 21980, 25928, 32410, 43960, 64820, 72691, 129640, 145382, 290764, 363455, 508837, 581528, 726910, 1017674, 1453820, 2035348, 2544185, 2907640, 4070696, 5088370, 10176740, 20353480]

約数ペア:

[(1, 20353480), (2, 10176740), (4, 5088370), (5, 4070696), (7, 2907640), (8, 2544185), (10, 2035348), (14, 1453820), (20, 1017674), (28, 726910), (35, 581528), (40, 508837), (56, 363455), (70, 290764), (140, 145382), (157, 129640), (280, 72691), (314, 64820), (463, 43960), (628, 32410), (785, 25928), (926, 21980), (1099, 18520), (1256, 16205), (1570, 12964), (1852, 10990), (2198, 9260), (2315, 8792), (3140, 6482), (3241, 6280), (3704, 5495), (4396, 4630)]