19871390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:353

約数の個数: 64

約数和(自身を含む): 45163008

約数和(自身を除く): 25291618

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 131, 154, 197, 262, 385, 394, 655, 770, 917, 985, 1310, 1379, 1441, 1834, 1970, 2167, 2758, 2882, 4334, 4585, 6895, 7205, 9170, 10087, 10835, 13790, 14410, 15169, 20174, 21670, 25807, 30338, 50435, 51614, 75845, 100870, 129035, 151690, 180649, 258070, 283877, 361298, 567754, 903245, 1419385, 1806490, 1987139, 2838770, 3974278, 9935695, 19871390]

約数ペア:

[(1, 19871390), (2, 9935695), (5, 3974278), (7, 2838770), (10, 1987139), (11, 1806490), (14, 1419385), (22, 903245), (35, 567754), (55, 361298), (70, 283877), (77, 258070), (110, 180649), (131, 151690), (154, 129035), (197, 100870), (262, 75845), (385, 51614), (394, 50435), (655, 30338), (770, 25807), (917, 21670), (985, 20174), (1310, 15169), (1379, 14410), (1441, 13790), (1834, 10835), (1970, 10087), (2167, 9170), (2758, 7205), (2882, 6895), (4334, 4585)]