661036720

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^2\times {\mathrm{311}}^1$

素因数の和:650

約数の個数: 60

約数和(自身を含む): 1551369456

約数和(自身を除く): 890332736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 311, 326, 622, 652, 815, 1244, 1304, 1555, 1630, 2488, 2608, 3110, 3260, 4976, 6220, 6520, 12440, 13040, 24880, 26569, 50693, 53138, 101386, 106276, 132845, 202772, 212552, 253465, 265690, 405544, 425104, 506930, 531380, 811088, 1013860, 1062760, 2027720, 2125520, 4055440, 8262959, 16525918, 33051836, 41314795, 66103672, 82629590, 132207344, 165259180, 330518360, 661036720]

約数ペア:

[(1, 661036720), (2, 330518360), (4, 165259180), (5, 132207344), (8, 82629590), (10, 66103672), (16, 41314795), (20, 33051836), (40, 16525918), (80, 8262959), (163, 4055440), (311, 2125520), (326, 2027720), (622, 1062760), (652, 1013860), (815, 811088), (1244, 531380), (1304, 506930), (1555, 425104), (1630, 405544), (2488, 265690), (2608, 253465), (3110, 212552), (3260, 202772), (4976, 132845), (6220, 106276), (6520, 101386), (12440, 53138), (13040, 50693), (24880, 26569)]