20864848

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{971}}^1$

素因数の和:1075

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 22525232

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 971, 1264, 1343, 1942, 2686, 3884, 5372, 7768, 10744, 15536, 16507, 21488, 33014, 66028, 76709, 132056, 153418, 264112, 306836, 613672, 1227344, 1304053, 2608106, 5216212, 10432424, 20864848]

約数ペア:

[(1, 20864848), (2, 10432424), (4, 5216212), (8, 2608106), (16, 1304053), (17, 1227344), (34, 613672), (68, 306836), (79, 264112), (136, 153418), (158, 132056), (272, 76709), (316, 66028), (632, 33014), (971, 21488), (1264, 16507), (1343, 15536), (1942, 10744), (2686, 7768), (3884, 5372)]