398136140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1\times {\mathrm{1721}}^1$

素因数の和:2042

約数の個数: 48

約数和(自身を含む): 859209120

約数和(自身を除く): 461072980

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 269, 430, 538, 860, 1076, 1345, 1721, 2690, 3442, 5380, 6884, 8605, 11567, 17210, 23134, 34420, 46268, 57835, 74003, 115670, 148006, 231340, 296012, 370015, 462949, 740030, 925898, 1480060, 1851796, 2314745, 4629490, 9258980, 19906807, 39813614, 79627228, 99534035, 199068070, 398136140]

約数ペア:

[(1, 398136140), (2, 199068070), (4, 99534035), (5, 79627228), (10, 39813614), (20, 19906807), (43, 9258980), (86, 4629490), (172, 2314745), (215, 1851796), (269, 1480060), (430, 925898), (538, 740030), (860, 462949), (1076, 370015), (1345, 296012), (1721, 231340), (2690, 148006), (3442, 115670), (5380, 74003), (6884, 57835), (8605, 46268), (11567, 34420), (17210, 23134)]