18617660

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{181}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 40666080

約数和(自身を除く): 22048420

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 139, 148, 181, 185, 278, 362, 370, 556, 695, 724, 740, 905, 1390, 1810, 2780, 3620, 5143, 6697, 10286, 13394, 20572, 25159, 25715, 26788, 33485, 50318, 51430, 66970, 100636, 102860, 125795, 133940, 251590, 503180, 930883, 1861766, 3723532, 4654415, 9308830, 18617660]

約数ペア:

[(1, 18617660), (2, 9308830), (4, 4654415), (5, 3723532), (10, 1861766), (20, 930883), (37, 503180), (74, 251590), (139, 133940), (148, 125795), (181, 102860), (185, 100636), (278, 66970), (362, 51430), (370, 50318), (556, 33485), (695, 26788), (724, 25715), (740, 25159), (905, 20572), (1390, 13394), (1810, 10286), (2780, 6697), (3620, 5143)]