20961875

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{3049}}^1$

素因数の和:3080

約数の個数: 20

約数和(自身を含む): 28584600

約数和(自身を除く): 7622725

約数列:

[1, 5, 11, 25, 55, 125, 275, 625, 1375, 3049, 6875, 15245, 33539, 76225, 167695, 381125, 838475, 1905625, 4192375, 20961875]

約数ペア:

[(1, 20961875), (5, 4192375), (11, 1905625), (25, 838475), (55, 381125), (125, 167695), (275, 76225), (625, 33539), (1375, 15245), (3049, 6875)]