20700472

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 42887880

約数和(自身を除く): 22187408

約数列:

[1, 2, 4, 8, 13, 26, 52, 61, 104, 122, 169, 244, 251, 338, 488, 502, 676, 793, 1004, 1352, 1586, 2008, 3172, 3263, 6344, 6526, 10309, 13052, 15311, 20618, 26104, 30622, 41236, 42419, 61244, 82472, 84838, 122488, 169676, 199043, 339352, 398086, 796172, 1592344, 2587559, 5175118, 10350236, 20700472]

約数ペア:

[(1, 20700472), (2, 10350236), (4, 5175118), (8, 2587559), (13, 1592344), (26, 796172), (52, 398086), (61, 339352), (104, 199043), (122, 169676), (169, 122488), (244, 84838), (251, 82472), (338, 61244), (488, 42419), (502, 41236), (676, 30622), (793, 26104), (1004, 20618), (1352, 15311), (1586, 13052), (2008, 10309), (3172, 6526), (3263, 6344)]