21884380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{163}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 54181008

約数和(自身を除く): 32296628

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 137, 140, 163, 196, 245, 274, 326, 490, 548, 652, 685, 815, 959, 980, 1141, 1370, 1630, 1918, 2282, 2740, 3260, 3836, 4564, 4795, 5705, 6713, 7987, 9590, 11410, 13426, 15974, 19180, 22331, 22820, 26852, 31948, 33565, 39935, 44662, 67130, 79870, 89324, 111655, 134260, 156317, 159740, 223310, 312634, 446620, 625268, 781585, 1094219, 1563170, 2188438, 3126340, 4376876, 5471095, 10942190, 21884380]

約数ペア:

[(1, 21884380), (2, 10942190), (4, 5471095), (5, 4376876), (7, 3126340), (10, 2188438), (14, 1563170), (20, 1094219), (28, 781585), (35, 625268), (49, 446620), (70, 312634), (98, 223310), (137, 159740), (140, 156317), (163, 134260), (196, 111655), (245, 89324), (274, 79870), (326, 67130), (490, 44662), (548, 39935), (652, 33565), (685, 31948), (815, 26852), (959, 22820), (980, 22331), (1141, 19180), (1370, 15974), (1630, 13426), (1918, 11410), (2282, 9590), (2740, 7987), (3260, 6713), (3836, 5705), (4564, 4795)]