81961850

素因数分解:

$2^1\times 5^2\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:419

約数の個数: 48

約数和(自身を含む): 157108248

約数和(自身を除く): 75146398

約数列:

[1, 2, 5, 10, 25, 50, 53, 106, 157, 197, 265, 314, 394, 530, 785, 985, 1325, 1570, 1970, 2650, 3925, 4925, 7850, 8321, 9850, 10441, 16642, 20882, 30929, 41605, 52205, 61858, 83210, 104410, 154645, 208025, 261025, 309290, 416050, 522050, 773225, 1546450, 1639237, 3278474, 8196185, 16392370, 40980925, 81961850]

約数ペア:

[(1, 81961850), (2, 40980925), (5, 16392370), (10, 8196185), (25, 3278474), (50, 1639237), (53, 1546450), (106, 773225), (157, 522050), (197, 416050), (265, 309290), (314, 261025), (394, 208025), (530, 154645), (785, 104410), (985, 83210), (1325, 61858), (1570, 52205), (1970, 41605), (2650, 30929), (3925, 20882), (4925, 16642), (7850, 10441), (8321, 9850)]