21579140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:309

約数の個数: 72

約数和(自身を含む): 51368856

約数和(自身を除く): 29789716

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 121, 148, 185, 220, 241, 242, 370, 407, 482, 484, 605, 740, 814, 964, 1205, 1210, 1628, 2035, 2410, 2420, 2651, 4070, 4477, 4820, 5302, 8140, 8917, 8954, 10604, 13255, 17834, 17908, 22385, 26510, 29161, 35668, 44585, 44770, 53020, 58322, 89170, 89540, 98087, 116644, 145805, 178340, 196174, 291610, 392348, 490435, 583220, 980870, 1078957, 1961740, 2157914, 4315828, 5394785, 10789570, 21579140]

約数ペア:

[(1, 21579140), (2, 10789570), (4, 5394785), (5, 4315828), (10, 2157914), (11, 1961740), (20, 1078957), (22, 980870), (37, 583220), (44, 490435), (55, 392348), (74, 291610), (110, 196174), (121, 178340), (148, 145805), (185, 116644), (220, 98087), (241, 89540), (242, 89170), (370, 58322), (407, 53020), (482, 44770), (484, 44585), (605, 35668), (740, 29161), (814, 26510), (964, 22385), (1205, 17908), (1210, 17834), (1628, 13255), (2035, 10604), (2410, 8954), (2420, 8917), (2651, 8140), (4070, 5302), (4477, 4820)]