40806820

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{281}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 88261488

約数和(自身を除く): 47454668

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 137, 212, 265, 274, 281, 530, 548, 562, 685, 1060, 1124, 1370, 1405, 2740, 2810, 5620, 7261, 14522, 14893, 29044, 29786, 36305, 38497, 59572, 72610, 74465, 76994, 145220, 148930, 153988, 192485, 297860, 384970, 769940, 2040341, 4080682, 8161364, 10201705, 20403410, 40806820]

約数ペア:

[(1, 40806820), (2, 20403410), (4, 10201705), (5, 8161364), (10, 4080682), (20, 2040341), (53, 769940), (106, 384970), (137, 297860), (212, 192485), (265, 153988), (274, 148930), (281, 145220), (530, 76994), (548, 74465), (562, 72610), (685, 59572), (1060, 38497), (1124, 36305), (1370, 29786), (1405, 29044), (2740, 14893), (2810, 14522), (5620, 7261)]