210804920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{122561}}^1$

素因数の和:122615

約数の個数: 32

約数和(自身を含む): 485345520

約数和(自身を除く): 274540600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 122561, 245122, 490244, 612805, 980488, 1225610, 2451220, 4902440, 5270123, 10540246, 21080492, 26350615, 42160984, 52701230, 105402460, 210804920]

約数ペア:

[(1, 210804920), (2, 105402460), (4, 52701230), (5, 42160984), (8, 26350615), (10, 21080492), (20, 10540246), (40, 5270123), (43, 4902440), (86, 2451220), (172, 1225610), (215, 980488), (344, 612805), (430, 490244), (860, 245122), (1720, 122561)]