20839840

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{809}}^1$

素因数の和:854

約数の個数: 96

約数和(自身を含む): 58786560

約数和(自身を除く): 37946720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 160, 161, 184, 224, 230, 280, 322, 368, 460, 560, 644, 736, 805, 809, 920, 1120, 1288, 1610, 1618, 1840, 2576, 3220, 3236, 3680, 4045, 5152, 5663, 6440, 6472, 8090, 11326, 12880, 12944, 16180, 18607, 22652, 25760, 25888, 28315, 32360, 37214, 45304, 56630, 64720, 74428, 90608, 93035, 113260, 129440, 130249, 148856, 181216, 186070, 226520, 260498, 297712, 372140, 453040, 520996, 595424, 651245, 744280, 906080, 1041992, 1302490, 1488560, 2083984, 2604980, 2977120, 4167968, 5209960, 10419920, 20839840]

約数ペア:

[(1, 20839840), (2, 10419920), (4, 5209960), (5, 4167968), (7, 2977120), (8, 2604980), (10, 2083984), (14, 1488560), (16, 1302490), (20, 1041992), (23, 906080), (28, 744280), (32, 651245), (35, 595424), (40, 520996), (46, 453040), (56, 372140), (70, 297712), (80, 260498), (92, 226520), (112, 186070), (115, 181216), (140, 148856), (160, 130249), (161, 129440), (184, 113260), (224, 93035), (230, 90608), (280, 74428), (322, 64720), (368, 56630), (460, 45304), (560, 37214), (644, 32360), (736, 28315), (805, 25888), (809, 25760), (920, 22652), (1120, 18607), (1288, 16180), (1610, 12944), (1618, 12880), (1840, 11326), (2576, 8090), (3220, 6472), (3236, 6440), (3680, 5663), (4045, 5152)]