204521720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{393311}}^1$

素因数の和:393335

約数の個数: 32

約数和(自身を含む): 495573120

約数和(自身を除く): 291051400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 393311, 786622, 1573244, 1966555, 3146488, 3933110, 5113043, 7866220, 10226086, 15732440, 20452172, 25565215, 40904344, 51130430, 102260860, 204521720]

約数ペア:

[(1, 204521720), (2, 102260860), (4, 51130430), (5, 40904344), (8, 25565215), (10, 20452172), (13, 15732440), (20, 10226086), (26, 7866220), (40, 5113043), (52, 3933110), (65, 3146488), (104, 1966555), (130, 1573244), (260, 786622), (520, 393311)]