81456280

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{7247}}^1$

素因数の和:7539

約数の個数: 32

約数和(自身を含む): 183954240

約数和(自身を除く): 102497960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 2248, 2810, 5620, 7247, 11240, 14494, 28988, 36235, 57976, 72470, 144940, 289880, 2036407, 4072814, 8145628, 10182035, 16291256, 20364070, 40728140, 81456280]

約数ペア:

[(1, 81456280), (2, 40728140), (4, 20364070), (5, 16291256), (8, 10182035), (10, 8145628), (20, 4072814), (40, 2036407), (281, 289880), (562, 144940), (1124, 72470), (1405, 57976), (2248, 36235), (2810, 28988), (5620, 14494), (7247, 11240)]