19722220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{787}}^1$

素因数の和:982

約数の個数: 48

約数和(自身を含む): 47658240

約数和(自身を除く): 27936020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 179, 358, 716, 787, 895, 1253, 1574, 1790, 2506, 3148, 3580, 3935, 5012, 5509, 6265, 7870, 11018, 12530, 15740, 22036, 25060, 27545, 55090, 110180, 140873, 281746, 563492, 704365, 986111, 1408730, 1972222, 2817460, 3944444, 4930555, 9861110, 19722220]

約数ペア:

[(1, 19722220), (2, 9861110), (4, 4930555), (5, 3944444), (7, 2817460), (10, 1972222), (14, 1408730), (20, 986111), (28, 704365), (35, 563492), (70, 281746), (140, 140873), (179, 110180), (358, 55090), (716, 27545), (787, 25060), (895, 22036), (1253, 15740), (1574, 12530), (1790, 11018), (2506, 7870), (3148, 6265), (3580, 5509), (3935, 5012)]