20658700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 48121920

約数和(自身を除く): 27463220

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 83, 95, 100, 131, 166, 190, 262, 332, 380, 415, 475, 524, 655, 830, 950, 1310, 1577, 1660, 1900, 2075, 2489, 2620, 3154, 3275, 4150, 4978, 6308, 6550, 7885, 8300, 9956, 10873, 12445, 13100, 15770, 21746, 24890, 31540, 39425, 43492, 49780, 54365, 62225, 78850, 108730, 124450, 157700, 206587, 217460, 248900, 271825, 413174, 543650, 826348, 1032935, 1087300, 2065870, 4131740, 5164675, 10329350, 20658700]

約数ペア:

[(1, 20658700), (2, 10329350), (4, 5164675), (5, 4131740), (10, 2065870), (19, 1087300), (20, 1032935), (25, 826348), (38, 543650), (50, 413174), (76, 271825), (83, 248900), (95, 217460), (100, 206587), (131, 157700), (166, 124450), (190, 108730), (262, 78850), (332, 62225), (380, 54365), (415, 49780), (475, 43492), (524, 39425), (655, 31540), (830, 24890), (950, 21746), (1310, 15770), (1577, 13100), (1660, 12445), (1900, 10873), (2075, 9956), (2489, 8300), (2620, 7885), (3154, 6550), (3275, 6308), (4150, 4978)]