639778930

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{294829}}^1$

素因数の和:294874

約数の個数: 32

約数和(自身を含む): 1358576640

約数和(自身を除く): 718797710

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 155, 217, 310, 434, 1085, 2170, 294829, 589658, 1474145, 2063803, 2948290, 4127606, 9139699, 10319015, 18279398, 20638030, 45698495, 63977893, 91396990, 127955786, 319889465, 639778930]

約数ペア:

[(1, 639778930), (2, 319889465), (5, 127955786), (7, 91396990), (10, 63977893), (14, 45698495), (31, 20638030), (35, 18279398), (62, 10319015), (70, 9139699), (155, 4127606), (217, 2948290), (310, 2063803), (434, 1474145), (1085, 589658), (2170, 294829)]