19813750

素因数分解:

$2^1\times 5^4\times {\mathrm{11}}^2\times {\mathrm{131}}^1$

素因数の和:175

約数の個数: 60

約数和(自身を含む): 41133708

約数和(自身を除く): 21319958

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 121, 125, 131, 242, 250, 262, 275, 550, 605, 625, 655, 1210, 1250, 1310, 1375, 1441, 2750, 2882, 3025, 3275, 6050, 6550, 6875, 7205, 13750, 14410, 15125, 15851, 16375, 30250, 31702, 32750, 36025, 72050, 75625, 79255, 81875, 151250, 158510, 163750, 180125, 360250, 396275, 792550, 900625, 1801250, 1981375, 3962750, 9906875, 19813750]

約数ペア:

[(1, 19813750), (2, 9906875), (5, 3962750), (10, 1981375), (11, 1801250), (22, 900625), (25, 792550), (50, 396275), (55, 360250), (110, 180125), (121, 163750), (125, 158510), (131, 151250), (242, 81875), (250, 79255), (262, 75625), (275, 72050), (550, 36025), (605, 32750), (625, 31702), (655, 30250), (1210, 16375), (1250, 15851), (1310, 15125), (1375, 14410), (1441, 13750), (2750, 7205), (2882, 6875), (3025, 6550), (3275, 6050)]