19801940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{419}}^1$

素因数の和:584

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 24650860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 139, 170, 278, 340, 419, 556, 695, 838, 1390, 1676, 2095, 2363, 2780, 4190, 4726, 7123, 8380, 9452, 11815, 14246, 23630, 28492, 35615, 47260, 58241, 71230, 116482, 142460, 232964, 291205, 582410, 990097, 1164820, 1980194, 3960388, 4950485, 9900970, 19801940]

約数ペア:

[(1, 19801940), (2, 9900970), (4, 4950485), (5, 3960388), (10, 1980194), (17, 1164820), (20, 990097), (34, 582410), (68, 291205), (85, 232964), (139, 142460), (170, 116482), (278, 71230), (340, 58241), (419, 47260), (556, 35615), (695, 28492), (838, 23630), (1390, 14246), (1676, 11815), (2095, 9452), (2363, 8380), (2780, 7123), (4190, 4726)]