28306520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{64333}}^1$

素因数の和:64355

約数の個数: 32

約数和(自身を含む): 69480720

約数和(自身を除く): 41174200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 64333, 128666, 257332, 321665, 514664, 643330, 707663, 1286660, 1415326, 2573320, 2830652, 3538315, 5661304, 7076630, 14153260, 28306520]

約数ペア:

[(1, 28306520), (2, 14153260), (4, 7076630), (5, 5661304), (8, 3538315), (10, 2830652), (11, 2573320), (20, 1415326), (22, 1286660), (40, 707663), (44, 643330), (55, 514664), (88, 321665), (110, 257332), (220, 128666), (440, 64333)]