201821990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{7129}}^1$

素因数の和:7304

約数の個数: 32

約数和(自身を含む): 385020000

約数和(自身を除く): 183198010

約数列:

[1, 2, 5, 10, 19, 38, 95, 149, 190, 298, 745, 1490, 2831, 5662, 7129, 14155, 14258, 28310, 35645, 71290, 135451, 270902, 677255, 1062221, 1354510, 2124442, 5311105, 10622210, 20182199, 40364398, 100910995, 201821990]

約数ペア:

[(1, 201821990), (2, 100910995), (5, 40364398), (10, 20182199), (19, 10622210), (38, 5311105), (95, 2124442), (149, 1354510), (190, 1062221), (298, 677255), (745, 270902), (1490, 135451), (2831, 71290), (5662, 35645), (7129, 28310), (14155, 14258)]