21745240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{677}}^1$

素因数の和:772

約数の個数: 64

約数和(自身を含む): 54185760

約数和(自身を除く): 32440520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 584, 677, 730, 803, 1354, 1460, 1606, 2708, 2920, 3212, 3385, 4015, 5416, 6424, 6770, 7447, 8030, 13540, 14894, 16060, 27080, 29788, 32120, 37235, 49421, 59576, 74470, 98842, 148940, 197684, 247105, 297880, 395368, 494210, 543631, 988420, 1087262, 1976840, 2174524, 2718155, 4349048, 5436310, 10872620, 21745240]

約数ペア:

[(1, 21745240), (2, 10872620), (4, 5436310), (5, 4349048), (8, 2718155), (10, 2174524), (11, 1976840), (20, 1087262), (22, 988420), (40, 543631), (44, 494210), (55, 395368), (73, 297880), (88, 247105), (110, 197684), (146, 148940), (220, 98842), (292, 74470), (365, 59576), (440, 49421), (584, 37235), (677, 32120), (730, 29788), (803, 27080), (1354, 16060), (1460, 14894), (1606, 13540), (2708, 8030), (2920, 7447), (3212, 6770), (3385, 6424), (4015, 5416)]