21389888

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{547}}^1$

素因数の和:619

約数の個数: 56

約数和(自身を含む): 46768512

約数和(自身を除く): 25378624

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 47, 52, 64, 94, 104, 188, 208, 376, 416, 547, 611, 752, 832, 1094, 1222, 1504, 2188, 2444, 3008, 4376, 4888, 7111, 8752, 9776, 14222, 17504, 19552, 25709, 28444, 35008, 39104, 51418, 56888, 102836, 113776, 205672, 227552, 334217, 411344, 455104, 668434, 822688, 1336868, 1645376, 2673736, 5347472, 10694944, 21389888]

約数ペア:

[(1, 21389888), (2, 10694944), (4, 5347472), (8, 2673736), (13, 1645376), (16, 1336868), (26, 822688), (32, 668434), (47, 455104), (52, 411344), (64, 334217), (94, 227552), (104, 205672), (188, 113776), (208, 102836), (376, 56888), (416, 51418), (547, 39104), (611, 35008), (752, 28444), (832, 25709), (1094, 19552), (1222, 17504), (1504, 14222), (2188, 9776), (2444, 8752), (3008, 7111), (4376, 4888)]