20809640488

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{402601}}^1$

素因数の和:402698

約数の個数: 64

約数和(自身を含む): 48698737920

約数和(自身を除く): 27889097432

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 71, 91, 104, 142, 182, 284, 364, 497, 568, 728, 923, 994, 1846, 1988, 3692, 3976, 6461, 7384, 12922, 25844, 51688, 402601, 805202, 1610404, 2818207, 3220808, 5233813, 5636414, 10467626, 11272828, 20935252, 22545656, 28584671, 36636691, 41870504, 57169342, 73273382, 114338684, 146546764, 200092697, 228677368, 293093528, 371600723, 400185394, 743201446, 800370788, 1486402892, 1600741576, 2601205061, 2972805784, 5202410122, 10404820244, 20809640488]

約数ペア:

[(1, 20809640488), (2, 10404820244), (4, 5202410122), (7, 2972805784), (8, 2601205061), (13, 1600741576), (14, 1486402892), (26, 800370788), (28, 743201446), (52, 400185394), (56, 371600723), (71, 293093528), (91, 228677368), (104, 200092697), (142, 146546764), (182, 114338684), (284, 73273382), (364, 57169342), (497, 41870504), (568, 36636691), (728, 28584671), (923, 22545656), (994, 20935252), (1846, 11272828), (1988, 10467626), (3692, 5636414), (3976, 5233813), (6461, 3220808), (7384, 2818207), (12922, 1610404), (25844, 805202), (51688, 402601)]