19999906928

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{491}}^1\times {\mathrm{2003}}^1$

素因数の和:2574

約数の個数: 80

約数和(自身を含む): 41079370752

約数和(自身を除く): 21079463824

約数列:

[1, 2, 4, 8, 16, 31, 41, 62, 82, 124, 164, 248, 328, 491, 496, 656, 982, 1271, 1964, 2003, 2542, 3928, 4006, 5084, 7856, 8012, 10168, 15221, 16024, 20131, 20336, 30442, 32048, 40262, 60884, 62093, 80524, 82123, 121768, 124186, 161048, 164246, 243536, 248372, 322096, 328492, 496744, 624061, 656984, 983473, 993488, 1248122, 1313968, 1966946, 2496244, 2545813, 3933892, 4992488, 5091626, 7867784, 9984976, 10183252, 15735568, 20366504, 30487663, 40322393, 40733008, 60975326, 80644786, 121950652, 161289572, 243901304, 322579144, 487802608, 645158288, 1249994183, 2499988366, 4999976732, 9999953464, 19999906928]

約数ペア:

[(1, 19999906928), (2, 9999953464), (4, 4999976732), (8, 2499988366), (16, 1249994183), (31, 645158288), (41, 487802608), (62, 322579144), (82, 243901304), (124, 161289572), (164, 121950652), (248, 80644786), (328, 60975326), (491, 40733008), (496, 40322393), (656, 30487663), (982, 20366504), (1271, 15735568), (1964, 10183252), (2003, 9984976), (2542, 7867784), (3928, 5091626), (4006, 4992488), (5084, 3933892), (7856, 2545813), (8012, 2496244), (10168, 1966946), (15221, 1313968), (16024, 1248122), (20131, 993488), (20336, 983473), (30442, 656984), (32048, 624061), (40262, 496744), (60884, 328492), (62093, 322096), (80524, 248372), (82123, 243536), (121768, 164246), (124186, 161048)]