20994440

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16931}}^1$

素因数の和:16973

約数の個数: 32

約数和(自身を含む): 48764160

約数和(自身を除く): 27769720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16931, 33862, 67724, 84655, 135448, 169310, 338620, 524861, 677240, 1049722, 2099444, 2624305, 4198888, 5248610, 10497220, 20994440]

約数ペア:

[(1, 20994440), (2, 10497220), (4, 5248610), (5, 4198888), (8, 2624305), (10, 2099444), (20, 1049722), (31, 677240), (40, 524861), (62, 338620), (124, 169310), (155, 135448), (248, 84655), (310, 67724), (620, 33862), (1240, 16931)]