20971280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23831}}^1$

素因数の和:23855

約数の個数: 40

約数和(自身を含む): 53193024

約数和(自身を除く): 32221744

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23831, 47662, 95324, 119155, 190648, 238310, 262141, 381296, 476620, 524282, 953240, 1048564, 1310705, 1906480, 2097128, 2621410, 4194256, 5242820, 10485640, 20971280]

約数ペア:

[(1, 20971280), (2, 10485640), (4, 5242820), (5, 4194256), (8, 2621410), (10, 2097128), (11, 1906480), (16, 1310705), (20, 1048564), (22, 953240), (40, 524282), (44, 476620), (55, 381296), (80, 262141), (88, 238310), (110, 190648), (176, 119155), (220, 95324), (440, 47662), (880, 23831)]