20199740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:539

約数の個数: 72

約数和(自身を含む): 49469616

約数和(自身を除く): 29269876

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 121, 170, 187, 220, 242, 340, 374, 484, 491, 605, 748, 935, 982, 1210, 1870, 1964, 2057, 2420, 2455, 3740, 4114, 4910, 5401, 8228, 8347, 9820, 10285, 10802, 16694, 20570, 21604, 27005, 33388, 41140, 41735, 54010, 59411, 83470, 91817, 108020, 118822, 166940, 183634, 237644, 297055, 367268, 459085, 594110, 918170, 1009987, 1188220, 1836340, 2019974, 4039948, 5049935, 10099870, 20199740]

約数ペア:

[(1, 20199740), (2, 10099870), (4, 5049935), (5, 4039948), (10, 2019974), (11, 1836340), (17, 1188220), (20, 1009987), (22, 918170), (34, 594110), (44, 459085), (55, 367268), (68, 297055), (85, 237644), (110, 183634), (121, 166940), (170, 118822), (187, 108020), (220, 91817), (242, 83470), (340, 59411), (374, 54010), (484, 41735), (491, 41140), (605, 33388), (748, 27005), (935, 21604), (982, 20570), (1210, 16694), (1870, 10802), (1964, 10285), (2057, 9820), (2420, 8347), (2455, 8228), (3740, 5401), (4114, 4910)]