78991420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{96331}}^1$

素因数の和:96381

約数の個数: 24

約数和(自身を含む): 169929648

約数和(自身を除く): 90938228

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 96331, 192662, 385324, 481655, 963310, 1926620, 3949571, 7899142, 15798284, 19747855, 39495710, 78991420]

約数ペア:

[(1, 78991420), (2, 39495710), (4, 19747855), (5, 15798284), (10, 7899142), (20, 3949571), (41, 1926620), (82, 963310), (164, 481655), (205, 385324), (410, 192662), (820, 96331)]