21356855740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{2153}}^1\times {\mathrm{4099}}^1$

素因数の和:6283

約数の個数: 72

約数和(自身を含む): 49332200400

約数和(自身を除く): 27975344660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2153, 2420, 4099, 4306, 8198, 8612, 10765, 16396, 20495, 21530, 23683, 40990, 43060, 45089, 47366, 81980, 90178, 94732, 118415, 180356, 225445, 236830, 260513, 450890, 473660, 495979, 521026, 901780, 991958, 1042052, 1302565, 1983916, 2479895, 2605130, 4959790, 5210260, 8825147, 9919580, 17650294, 35300588, 44125735, 88251470, 97076617, 176502940, 194153234, 388306468, 485383085, 970766170, 1067842787, 1941532340, 2135685574, 4271371148, 5339213935, 10678427870, 21356855740]

約数ペア:

[(1, 21356855740), (2, 10678427870), (4, 5339213935), (5, 4271371148), (10, 2135685574), (11, 1941532340), (20, 1067842787), (22, 970766170), (44, 485383085), (55, 388306468), (110, 194153234), (121, 176502940), (220, 97076617), (242, 88251470), (484, 44125735), (605, 35300588), (1210, 17650294), (2153, 9919580), (2420, 8825147), (4099, 5210260), (4306, 4959790), (8198, 2605130), (8612, 2479895), (10765, 1983916), (16396, 1302565), (20495, 1042052), (21530, 991958), (23683, 901780), (40990, 521026), (43060, 495979), (45089, 473660), (47366, 450890), (81980, 260513), (90178, 236830), (94732, 225445), (118415, 180356)]