221488280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{425939}}^1$

素因数の和:425963

約数の個数: 32

約数和(自身を含む): 536684400

約数和(自身を除く): 315196120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 425939, 851878, 1703756, 2129695, 3407512, 4259390, 5537207, 8518780, 11074414, 17037560, 22148828, 27686035, 44297656, 55372070, 110744140, 221488280]

約数ペア:

[(1, 221488280), (2, 110744140), (4, 55372070), (5, 44297656), (8, 27686035), (10, 22148828), (13, 17037560), (20, 11074414), (26, 8518780), (40, 5537207), (52, 4259390), (65, 3407512), (104, 2129695), (130, 1703756), (260, 851878), (520, 425939)]