390837320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{227231}}^1$

素因数の和:227285

約数の個数: 32

約数和(自身を含む): 899838720

約数和(自身を除く): 509001400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 227231, 454462, 908924, 1136155, 1817848, 2272310, 4544620, 9089240, 9770933, 19541866, 39083732, 48854665, 78167464, 97709330, 195418660, 390837320]

約数ペア:

[(1, 390837320), (2, 195418660), (4, 97709330), (5, 78167464), (8, 48854665), (10, 39083732), (20, 19541866), (40, 9770933), (43, 9089240), (86, 4544620), (172, 2272310), (215, 1817848), (344, 1136155), (430, 908924), (860, 454462), (1720, 227231)]