256469720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{493211}}^1$

素因数の和:493235

約数の個数: 32

約数和(自身を含む): 621447120

約数和(自身を除く): 364977400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 493211, 986422, 1972844, 2466055, 3945688, 4932110, 6411743, 9864220, 12823486, 19728440, 25646972, 32058715, 51293944, 64117430, 128234860, 256469720]

約数ペア:

[(1, 256469720), (2, 128234860), (4, 64117430), (5, 51293944), (8, 32058715), (10, 25646972), (13, 19728440), (20, 12823486), (26, 9864220), (40, 6411743), (52, 4932110), (65, 3945688), (104, 2466055), (130, 1972844), (260, 986422), (520, 493211)]