16681720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1223}}^1$

素因数の和:1276

約数の個数: 64

約数和(自身を含む): 42301440

約数和(自身を除く): 25619720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1223, 1240, 1364, 1705, 2446, 2728, 3410, 4892, 6115, 6820, 9784, 12230, 13453, 13640, 24460, 26906, 37913, 48920, 53812, 67265, 75826, 107624, 134530, 151652, 189565, 269060, 303304, 379130, 417043, 538120, 758260, 834086, 1516520, 1668172, 2085215, 3336344, 4170430, 8340860, 16681720]

約数ペア:

[(1, 16681720), (2, 8340860), (4, 4170430), (5, 3336344), (8, 2085215), (10, 1668172), (11, 1516520), (20, 834086), (22, 758260), (31, 538120), (40, 417043), (44, 379130), (55, 303304), (62, 269060), (88, 189565), (110, 151652), (124, 134530), (155, 107624), (220, 75826), (248, 67265), (310, 53812), (341, 48920), (440, 37913), (620, 26906), (682, 24460), (1223, 13640), (1240, 13453), (1364, 12230), (1705, 9784), (2446, 6820), (2728, 6115), (3410, 4892)]