18980780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10429}}^1$

素因数の和:10458

約数の個数: 48

約数和(自身を含む): 49062720

約数和(自身を除く): 30081940

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10429, 20858, 41716, 52145, 73003, 104290, 135577, 146006, 208580, 271154, 292012, 365015, 542308, 677885, 730030, 949039, 1355770, 1460060, 1898078, 2711540, 3796156, 4745195, 9490390, 18980780]

約数ペア:

[(1, 18980780), (2, 9490390), (4, 4745195), (5, 3796156), (7, 2711540), (10, 1898078), (13, 1460060), (14, 1355770), (20, 949039), (26, 730030), (28, 677885), (35, 542308), (52, 365015), (65, 292012), (70, 271154), (91, 208580), (130, 146006), (140, 135577), (182, 104290), (260, 73003), (364, 52145), (455, 41716), (910, 20858), (1820, 10429)]