78698540

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1\times {\mathrm{257}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 169301664

約数和(自身を除く): 90603124

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 251, 257, 305, 502, 514, 610, 1004, 1028, 1220, 1255, 1285, 2510, 2570, 5020, 5140, 15311, 15677, 30622, 31354, 61244, 62708, 64507, 76555, 78385, 129014, 153110, 156770, 258028, 306220, 313540, 322535, 645070, 1290140, 3934927, 7869854, 15739708, 19674635, 39349270, 78698540]

約数ペア:

[(1, 78698540), (2, 39349270), (4, 19674635), (5, 15739708), (10, 7869854), (20, 3934927), (61, 1290140), (122, 645070), (244, 322535), (251, 313540), (257, 306220), (305, 258028), (502, 156770), (514, 153110), (610, 129014), (1004, 78385), (1028, 76555), (1220, 64507), (1255, 62708), (1285, 61244), (2510, 31354), (2570, 30622), (5020, 15677), (5140, 15311)]