81377780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{3457}}^1$

素因数の和:3584

約数の個数: 48

約数和(自身を含む): 188225856

約数和(自身を除く): 106848076

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 107, 110, 214, 220, 428, 535, 1070, 1177, 2140, 2354, 3457, 4708, 5885, 6914, 11770, 13828, 17285, 23540, 34570, 38027, 69140, 76054, 152108, 190135, 369899, 380270, 739798, 760540, 1479596, 1849495, 3698990, 4068889, 7397980, 8137778, 16275556, 20344445, 40688890, 81377780]

約数ペア:

[(1, 81377780), (2, 40688890), (4, 20344445), (5, 16275556), (10, 8137778), (11, 7397980), (20, 4068889), (22, 3698990), (44, 1849495), (55, 1479596), (107, 760540), (110, 739798), (214, 380270), (220, 369899), (428, 190135), (535, 152108), (1070, 76054), (1177, 69140), (2140, 38027), (2354, 34570), (3457, 23540), (4708, 17285), (5885, 13828), (6914, 11770)]