20986420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{887}}^1$

素因数の和:929

約数の個数: 72

約数和(自身を含む): 54601344

約数和(自身を除く): 33614924

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 169, 182, 260, 338, 364, 455, 676, 845, 887, 910, 1183, 1690, 1774, 1820, 2366, 3380, 3548, 4435, 4732, 5915, 6209, 8870, 11531, 11830, 12418, 17740, 23062, 23660, 24836, 31045, 46124, 57655, 62090, 80717, 115310, 124180, 149903, 161434, 230620, 299806, 322868, 403585, 599612, 749515, 807170, 1049321, 1499030, 1614340, 2098642, 2998060, 4197284, 5246605, 10493210, 20986420]

約数ペア:

[(1, 20986420), (2, 10493210), (4, 5246605), (5, 4197284), (7, 2998060), (10, 2098642), (13, 1614340), (14, 1499030), (20, 1049321), (26, 807170), (28, 749515), (35, 599612), (52, 403585), (65, 322868), (70, 299806), (91, 230620), (130, 161434), (140, 149903), (169, 124180), (182, 115310), (260, 80717), (338, 62090), (364, 57655), (455, 46124), (676, 31045), (845, 24836), (887, 23660), (910, 23062), (1183, 17740), (1690, 12418), (1774, 11830), (1820, 11531), (2366, 8870), (3380, 6209), (3548, 5915), (4435, 4732)]