21135712

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^2$

素因数の和:140

約数の個数: 72

約数和(自身を含む): 47776176

約数和(自身を除く): 26640464

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 32, 46, 47, 52, 92, 94, 104, 184, 188, 208, 299, 368, 376, 416, 598, 611, 736, 752, 1081, 1196, 1222, 1504, 2162, 2209, 2392, 2444, 4324, 4418, 4784, 4888, 8648, 8836, 9568, 9776, 14053, 17296, 17672, 19552, 28106, 28717, 34592, 35344, 50807, 56212, 57434, 70688, 101614, 112424, 114868, 203228, 224848, 229736, 406456, 449696, 459472, 660491, 812912, 918944, 1320982, 1625824, 2641964, 5283928, 10567856, 21135712]

約数ペア:

[(1, 21135712), (2, 10567856), (4, 5283928), (8, 2641964), (13, 1625824), (16, 1320982), (23, 918944), (26, 812912), (32, 660491), (46, 459472), (47, 449696), (52, 406456), (92, 229736), (94, 224848), (104, 203228), (184, 114868), (188, 112424), (208, 101614), (299, 70688), (368, 57434), (376, 56212), (416, 50807), (598, 35344), (611, 34592), (736, 28717), (752, 28106), (1081, 19552), (1196, 17672), (1222, 17296), (1504, 14053), (2162, 9776), (2209, 9568), (2392, 8836), (2444, 8648), (4324, 4888), (4418, 4784)]