78420280

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{3049}}^1$

素因数の和:3703

約数の個数: 32

約数和(自身を含む): 176778000

約数和(自身を除く): 98357720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3049, 3215, 5144, 6098, 6430, 12196, 12860, 15245, 24392, 25720, 30490, 60980, 121960, 1960507, 3921014, 7842028, 9802535, 15684056, 19605070, 39210140, 78420280]

約数ペア:

[(1, 78420280), (2, 39210140), (4, 19605070), (5, 15684056), (8, 9802535), (10, 7842028), (20, 3921014), (40, 1960507), (643, 121960), (1286, 60980), (2572, 30490), (3049, 25720), (3215, 24392), (5144, 15245), (6098, 12860), (6430, 12196)]