19998120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9803}}^1$

素因数の和:9834

約数の個数: 64

約数和(自身を含む): 63529920

約数和(自身を除く): 43531800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 85, 102, 120, 136, 170, 204, 255, 340, 408, 510, 680, 1020, 2040, 9803, 19606, 29409, 39212, 49015, 58818, 78424, 98030, 117636, 147045, 166651, 196060, 235272, 294090, 333302, 392120, 499953, 588180, 666604, 833255, 999906, 1176360, 1333208, 1666510, 1999812, 2499765, 3333020, 3999624, 4999530, 6666040, 9999060, 19998120]

約数ペア:

[(1, 19998120), (2, 9999060), (3, 6666040), (4, 4999530), (5, 3999624), (6, 3333020), (8, 2499765), (10, 1999812), (12, 1666510), (15, 1333208), (17, 1176360), (20, 999906), (24, 833255), (30, 666604), (34, 588180), (40, 499953), (51, 392120), (60, 333302), (68, 294090), (85, 235272), (102, 196060), (120, 166651), (136, 147045), (170, 117636), (204, 98030), (255, 78424), (340, 58818), (408, 49015), (510, 39212), (680, 29409), (1020, 19606), (2040, 9803)]