18518380

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{353}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 40559904

約数和(自身を除く): 22041524

約数列:

[1, 2, 4, 5, 10, 20, 43, 61, 86, 122, 172, 215, 244, 305, 353, 430, 610, 706, 860, 1220, 1412, 1765, 2623, 3530, 5246, 7060, 10492, 13115, 15179, 21533, 26230, 30358, 43066, 52460, 60716, 75895, 86132, 107665, 151790, 215330, 303580, 430660, 925919, 1851838, 3703676, 4629595, 9259190, 18518380]

約数ペア:

[(1, 18518380), (2, 9259190), (4, 4629595), (5, 3703676), (10, 1851838), (20, 925919), (43, 430660), (61, 303580), (86, 215330), (122, 151790), (172, 107665), (215, 86132), (244, 75895), (305, 60716), (353, 52460), (430, 43066), (610, 30358), (706, 26230), (860, 21533), (1220, 15179), (1412, 13115), (1765, 10492), (2623, 7060), (3530, 5246)]