2021980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 4747680

約数和(自身を除く): 2725700

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 190, 313, 323, 340, 380, 626, 646, 1252, 1292, 1565, 1615, 3130, 3230, 5321, 5947, 6260, 6460, 10642, 11894, 21284, 23788, 26605, 29735, 53210, 59470, 101099, 106420, 118940, 202198, 404396, 505495, 1010990, 2021980]

約数ペア:

[(1, 2021980), (2, 1010990), (4, 505495), (5, 404396), (10, 202198), (17, 118940), (19, 106420), (20, 101099), (34, 59470), (38, 53210), (68, 29735), (76, 26605), (85, 23788), (95, 21284), (170, 11894), (190, 10642), (313, 6460), (323, 6260), (340, 5947), (380, 5321), (626, 3230), (646, 3130), (1252, 1615), (1292, 1565)]