645992740

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{269}}^1\times {\mathrm{719}}^1$

素因数の和:1164

約数の個数: 48

約数和(自身を含む): 1371686400

約数和(自身を除く): 725693660

約数列:

[1, 2, 4, 5, 10, 20, 167, 269, 334, 538, 668, 719, 835, 1076, 1345, 1438, 1670, 2690, 2876, 3340, 3595, 5380, 7190, 14380, 44923, 89846, 120073, 179692, 193411, 224615, 240146, 386822, 449230, 480292, 600365, 773644, 898460, 967055, 1200730, 1934110, 2401460, 3868220, 32299637, 64599274, 129198548, 161498185, 322996370, 645992740]

約数ペア:

[(1, 645992740), (2, 322996370), (4, 161498185), (5, 129198548), (10, 64599274), (20, 32299637), (167, 3868220), (269, 2401460), (334, 1934110), (538, 1200730), (668, 967055), (719, 898460), (835, 773644), (1076, 600365), (1345, 480292), (1438, 449230), (1670, 386822), (2690, 240146), (2876, 224615), (3340, 193411), (3595, 179692), (5380, 120073), (7190, 89846), (14380, 44923)]