72721840

素因数分解:

$2^4\times 5^1\times {\mathrm{909023}}^1$

素因数の和:909036

約数の個数: 20

約数和(自身を含む): 169078464

約数和(自身を除く): 96356624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 909023, 1818046, 3636092, 4545115, 7272184, 9090230, 14544368, 18180460, 36360920, 72721840]

約数ペア:

[(1, 72721840), (2, 36360920), (4, 18180460), (5, 14544368), (8, 9090230), (10, 7272184), (16, 4545115), (20, 3636092), (40, 1818046), (80, 909023)]