18985940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2939}}^1$

素因数の和:2984

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 25466860

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 190, 323, 340, 380, 646, 1292, 1615, 2939, 3230, 5878, 6460, 11756, 14695, 29390, 49963, 55841, 58780, 99926, 111682, 199852, 223364, 249815, 279205, 499630, 558410, 949297, 999260, 1116820, 1898594, 3797188, 4746485, 9492970, 18985940]

約数ペア:

[(1, 18985940), (2, 9492970), (4, 4746485), (5, 3797188), (10, 1898594), (17, 1116820), (19, 999260), (20, 949297), (34, 558410), (38, 499630), (68, 279205), (76, 249815), (85, 223364), (95, 199852), (170, 111682), (190, 99926), (323, 58780), (340, 55841), (380, 49963), (646, 29390), (1292, 14695), (1615, 11756), (2939, 6460), (3230, 5878)]