991640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1907}}^1$

素因数の和:1931

約数の個数: 32

約数和(自身を含む): 2404080

約数和(自身を除く): 1412440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1907, 3814, 7628, 9535, 15256, 19070, 24791, 38140, 49582, 76280, 99164, 123955, 198328, 247910, 495820, 991640]

約数ペア:

[(1, 991640), (2, 495820), (4, 247910), (5, 198328), (8, 123955), (10, 99164), (13, 76280), (20, 49582), (26, 38140), (40, 24791), (52, 19070), (65, 15256), (104, 9535), (130, 7628), (260, 3814), (520, 1907)]