21109216

素因数分解:

$2^5\times {\mathrm{23}}^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:128

約数の個数: 72

約数和(自身を含む): 45987480

約数和(自身を除く): 24878264

約数列:

[1, 2, 4, 8, 16, 23, 29, 32, 43, 46, 58, 86, 92, 116, 172, 184, 232, 344, 368, 464, 529, 667, 688, 736, 928, 989, 1058, 1247, 1334, 1376, 1978, 2116, 2494, 2668, 3956, 4232, 4988, 5336, 7912, 8464, 9976, 10672, 15341, 15824, 16928, 19952, 21344, 22747, 28681, 30682, 31648, 39904, 45494, 57362, 61364, 90988, 114724, 122728, 181976, 229448, 245456, 363952, 458896, 490912, 659663, 727904, 917792, 1319326, 2638652, 5277304, 10554608, 21109216]

約数ペア:

[(1, 21109216), (2, 10554608), (4, 5277304), (8, 2638652), (16, 1319326), (23, 917792), (29, 727904), (32, 659663), (43, 490912), (46, 458896), (58, 363952), (86, 245456), (92, 229448), (116, 181976), (172, 122728), (184, 114724), (232, 90988), (344, 61364), (368, 57362), (464, 45494), (529, 39904), (667, 31648), (688, 30682), (736, 28681), (928, 22747), (989, 21344), (1058, 19952), (1247, 16928), (1334, 15824), (1376, 15341), (1978, 10672), (2116, 9976), (2494, 8464), (2668, 7912), (3956, 5336), (4232, 4988)]