21631280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{523}}^1$

素因数の和:594

約数の個数: 80

約数和(自身を含む): 56139264

約数和(自身を除く): 34507984

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 47, 55, 80, 88, 94, 110, 176, 188, 220, 235, 376, 440, 470, 517, 523, 752, 880, 940, 1034, 1046, 1880, 2068, 2092, 2585, 2615, 3760, 4136, 4184, 5170, 5230, 5753, 8272, 8368, 10340, 10460, 11506, 20680, 20920, 23012, 24581, 28765, 41360, 41840, 46024, 49162, 57530, 92048, 98324, 115060, 122905, 196648, 230120, 245810, 270391, 393296, 460240, 491620, 540782, 983240, 1081564, 1351955, 1966480, 2163128, 2703910, 4326256, 5407820, 10815640, 21631280]

約数ペア:

[(1, 21631280), (2, 10815640), (4, 5407820), (5, 4326256), (8, 2703910), (10, 2163128), (11, 1966480), (16, 1351955), (20, 1081564), (22, 983240), (40, 540782), (44, 491620), (47, 460240), (55, 393296), (80, 270391), (88, 245810), (94, 230120), (110, 196648), (176, 122905), (188, 115060), (220, 98324), (235, 92048), (376, 57530), (440, 49162), (470, 46024), (517, 41840), (523, 41360), (752, 28765), (880, 24581), (940, 23012), (1034, 20920), (1046, 20680), (1880, 11506), (2068, 10460), (2092, 10340), (2585, 8368), (2615, 8272), (3760, 5753), (4136, 5230), (4184, 5170)]