20892500

素因数分解:

$2^2\times 5^4\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:222

約数の個数: 60

約数和(自身を含む): 46775652

約数和(自身を除く): 25883152

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 137, 244, 250, 274, 305, 500, 548, 610, 625, 685, 1220, 1250, 1370, 1525, 2500, 2740, 3050, 3425, 6100, 6850, 7625, 8357, 13700, 15250, 16714, 17125, 30500, 33428, 34250, 38125, 41785, 68500, 76250, 83570, 85625, 152500, 167140, 171250, 208925, 342500, 417850, 835700, 1044625, 2089250, 4178500, 5223125, 10446250, 20892500]

約数ペア:

[(1, 20892500), (2, 10446250), (4, 5223125), (5, 4178500), (10, 2089250), (20, 1044625), (25, 835700), (50, 417850), (61, 342500), (100, 208925), (122, 171250), (125, 167140), (137, 152500), (244, 85625), (250, 83570), (274, 76250), (305, 68500), (500, 41785), (548, 38125), (610, 34250), (625, 33428), (685, 30500), (1220, 17125), (1250, 16714), (1370, 15250), (1525, 13700), (2500, 8357), (2740, 7625), (3050, 6850), (3425, 6100)]