21297940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1693}}^1$

素因数の和:1756

約数の個数: 48

約数和(自身を含む): 48665232

約数和(自身を除く): 27367292

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 37, 68, 74, 85, 148, 170, 185, 340, 370, 629, 740, 1258, 1693, 2516, 3145, 3386, 6290, 6772, 8465, 12580, 16930, 28781, 33860, 57562, 62641, 115124, 125282, 143905, 250564, 287810, 313205, 575620, 626410, 1064897, 1252820, 2129794, 4259588, 5324485, 10648970, 21297940]

約数ペア:

[(1, 21297940), (2, 10648970), (4, 5324485), (5, 4259588), (10, 2129794), (17, 1252820), (20, 1064897), (34, 626410), (37, 575620), (68, 313205), (74, 287810), (85, 250564), (148, 143905), (170, 125282), (185, 115124), (340, 62641), (370, 57562), (629, 33860), (740, 28781), (1258, 16930), (1693, 12580), (2516, 8465), (3145, 6772), (3386, 6290)]