20197700

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{109}}^2$

素因数の和:249

約数の個数: 54

約数和(自身を含む): 46836846

約数和(自身を除く): 26639146

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 109, 170, 218, 340, 425, 436, 545, 850, 1090, 1700, 1853, 2180, 2725, 3706, 5450, 7412, 9265, 10900, 11881, 18530, 23762, 37060, 46325, 47524, 59405, 92650, 118810, 185300, 201977, 237620, 297025, 403954, 594050, 807908, 1009885, 1188100, 2019770, 4039540, 5049425, 10098850, 20197700]

約数ペア:

[(1, 20197700), (2, 10098850), (4, 5049425), (5, 4039540), (10, 2019770), (17, 1188100), (20, 1009885), (25, 807908), (34, 594050), (50, 403954), (68, 297025), (85, 237620), (100, 201977), (109, 185300), (170, 118810), (218, 92650), (340, 59405), (425, 47524), (436, 46325), (545, 37060), (850, 23762), (1090, 18530), (1700, 11881), (1853, 10900), (2180, 9265), (2725, 7412), (3706, 5450)]