81990100

素因数分解:

$2^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{13441}}^1$

素因数の和:13516

約数の個数: 36

約数和(自身を含む): 180848668

約数和(自身を除く): 98858568

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 244, 305, 610, 1220, 1525, 3050, 6100, 13441, 26882, 53764, 67205, 134410, 268820, 336025, 672050, 819901, 1344100, 1639802, 3279604, 4099505, 8199010, 16398020, 20497525, 40995050, 81990100]

約数ペア:

[(1, 81990100), (2, 40995050), (4, 20497525), (5, 16398020), (10, 8199010), (20, 4099505), (25, 3279604), (50, 1639802), (61, 1344100), (100, 819901), (122, 672050), (244, 336025), (305, 268820), (610, 134410), (1220, 67205), (1525, 53764), (3050, 26882), (6100, 13441)]