78778840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281353}}^1$

素因数の和:281371

約数の個数: 32

約数和(自身を含む): 202574880

約数和(自身を除く): 123796040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281353, 562706, 1125412, 1406765, 1969471, 2250824, 2813530, 3938942, 5627060, 7877884, 9847355, 11254120, 15755768, 19694710, 39389420, 78778840]

約数ペア:

[(1, 78778840), (2, 39389420), (4, 19694710), (5, 15755768), (7, 11254120), (8, 9847355), (10, 7877884), (14, 5627060), (20, 3938942), (28, 2813530), (35, 2250824), (40, 1969471), (56, 1406765), (70, 1125412), (140, 562706), (280, 281353)]