20420872

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:190

約数の個数: 64

約数和(自身を含む): 42768000

約数和(自身を除く): 22347128

約数列:

[1, 2, 4, 8, 23, 29, 43, 46, 58, 86, 89, 92, 116, 172, 178, 184, 232, 344, 356, 667, 712, 989, 1247, 1334, 1978, 2047, 2494, 2581, 2668, 3827, 3956, 4094, 4988, 5162, 5336, 7654, 7912, 8188, 9976, 10324, 15308, 16376, 20648, 28681, 30616, 57362, 59363, 88021, 110983, 114724, 118726, 176042, 221966, 229448, 237452, 352084, 443932, 474904, 704168, 887864, 2552609, 5105218, 10210436, 20420872]

約数ペア:

[(1, 20420872), (2, 10210436), (4, 5105218), (8, 2552609), (23, 887864), (29, 704168), (43, 474904), (46, 443932), (58, 352084), (86, 237452), (89, 229448), (92, 221966), (116, 176042), (172, 118726), (178, 114724), (184, 110983), (232, 88021), (344, 59363), (356, 57362), (667, 30616), (712, 28681), (989, 20648), (1247, 16376), (1334, 15308), (1978, 10324), (2047, 9976), (2494, 8188), (2581, 7912), (2668, 7654), (3827, 5336), (3956, 5162), (4094, 4988)]