18012500

素因数分解:

$2^2\times 5^5\times {\mathrm{11}}^1\times {\mathrm{131}}^1$

素因数の和:171

約数の個数: 72

約数和(自身を含む): 43309728

約数和(自身を除く): 25297228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 125, 131, 220, 250, 262, 275, 500, 524, 550, 625, 655, 1100, 1250, 1310, 1375, 1441, 2500, 2620, 2750, 2882, 3125, 3275, 5500, 5764, 6250, 6550, 6875, 7205, 12500, 13100, 13750, 14410, 16375, 27500, 28820, 32750, 34375, 36025, 65500, 68750, 72050, 81875, 137500, 144100, 163750, 180125, 327500, 360250, 409375, 720500, 818750, 900625, 1637500, 1801250, 3602500, 4503125, 9006250, 18012500]

約数ペア:

[(1, 18012500), (2, 9006250), (4, 4503125), (5, 3602500), (10, 1801250), (11, 1637500), (20, 900625), (22, 818750), (25, 720500), (44, 409375), (50, 360250), (55, 327500), (100, 180125), (110, 163750), (125, 144100), (131, 137500), (220, 81875), (250, 72050), (262, 68750), (275, 65500), (500, 36025), (524, 34375), (550, 32750), (625, 28820), (655, 27500), (1100, 16375), (1250, 14410), (1310, 13750), (1375, 13100), (1441, 12500), (2500, 7205), (2620, 6875), (2750, 6550), (2882, 6250), (3125, 5764), (3275, 5500)]