20378990

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{571}}^1$

素因数の和:704

約数の個数: 32

約数和(自身を含む): 38054016

約数和(自身を除く): 17675026

約数列:

[1, 2, 5, 10, 43, 83, 86, 166, 215, 415, 430, 571, 830, 1142, 2855, 3569, 5710, 7138, 17845, 24553, 35690, 47393, 49106, 94786, 122765, 236965, 245530, 473930, 2037899, 4075798, 10189495, 20378990]

約数ペア:

[(1, 20378990), (2, 10189495), (5, 4075798), (10, 2037899), (43, 473930), (83, 245530), (86, 236965), (166, 122765), (215, 94786), (415, 49106), (430, 47393), (571, 35690), (830, 24553), (1142, 17845), (2855, 7138), (3569, 5710)]