21321520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24229}}^1$

素因数の和:24253

約数の個数: 40

約数和(自身を含む): 54081360

約数和(自身を除く): 32759840

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24229, 48458, 96916, 121145, 193832, 242290, 266519, 387664, 484580, 533038, 969160, 1066076, 1332595, 1938320, 2132152, 2665190, 4264304, 5330380, 10660760, 21321520]

約数ペア:

[(1, 21321520), (2, 10660760), (4, 5330380), (5, 4264304), (8, 2665190), (10, 2132152), (11, 1938320), (16, 1332595), (20, 1066076), (22, 969160), (40, 533038), (44, 484580), (55, 387664), (80, 266519), (88, 242290), (110, 193832), (176, 121145), (220, 96916), (440, 48458), (880, 24229)]