21538760

素因数分解:

$2^3\times 5^1\times {\mathrm{463}}^1\times {\mathrm{1163}}^1$

素因数の和:1637

約数の個数: 32

約数和(自身を含む): 48608640

約数和(自身を除く): 27069880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 463, 926, 1163, 1852, 2315, 2326, 3704, 4630, 4652, 5815, 9260, 9304, 11630, 18520, 23260, 46520, 538469, 1076938, 2153876, 2692345, 4307752, 5384690, 10769380, 21538760]

約数ペア:

[(1, 21538760), (2, 10769380), (4, 5384690), (5, 4307752), (8, 2692345), (10, 2153876), (20, 1076938), (40, 538469), (463, 46520), (926, 23260), (1163, 18520), (1852, 11630), (2315, 9304), (2326, 9260), (3704, 5815), (4630, 4652)]