78400880

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{7481}}^1$

素因数の和:7625

約数の個数: 40

約数和(自身を含む): 183698064

約数和(自身を除く): 105297184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2096, 2620, 5240, 7481, 10480, 14962, 29924, 37405, 59848, 74810, 119696, 149620, 299240, 598480, 980011, 1960022, 3920044, 4900055, 7840088, 9800110, 15680176, 19600220, 39200440, 78400880]

約数ペア:

[(1, 78400880), (2, 39200440), (4, 19600220), (5, 15680176), (8, 9800110), (10, 7840088), (16, 4900055), (20, 3920044), (40, 1960022), (80, 980011), (131, 598480), (262, 299240), (524, 149620), (655, 119696), (1048, 74810), (1310, 59848), (2096, 37405), (2620, 29924), (5240, 14962), (7481, 10480)]