20716640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{349}}^1$

素因数の和:424

約数の個数: 96

約数和(自身を含む): 57153600

約数和(自身を除く): 36436960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 53, 56, 70, 80, 106, 112, 140, 160, 212, 224, 265, 280, 349, 371, 424, 530, 560, 698, 742, 848, 1060, 1120, 1396, 1484, 1696, 1745, 1855, 2120, 2443, 2792, 2968, 3490, 3710, 4240, 4886, 5584, 5936, 6980, 7420, 8480, 9772, 11168, 11872, 12215, 13960, 14840, 18497, 19544, 24430, 27920, 29680, 36994, 39088, 48860, 55840, 59360, 73988, 78176, 92485, 97720, 129479, 147976, 184970, 195440, 258958, 295952, 369940, 390880, 517916, 591904, 647395, 739880, 1035832, 1294790, 1479760, 2071664, 2589580, 2959520, 4143328, 5179160, 10358320, 20716640]

約数ペア:

[(1, 20716640), (2, 10358320), (4, 5179160), (5, 4143328), (7, 2959520), (8, 2589580), (10, 2071664), (14, 1479760), (16, 1294790), (20, 1035832), (28, 739880), (32, 647395), (35, 591904), (40, 517916), (53, 390880), (56, 369940), (70, 295952), (80, 258958), (106, 195440), (112, 184970), (140, 147976), (160, 129479), (212, 97720), (224, 92485), (265, 78176), (280, 73988), (349, 59360), (371, 55840), (424, 48860), (530, 39088), (560, 36994), (698, 29680), (742, 27920), (848, 24430), (1060, 19544), (1120, 18497), (1396, 14840), (1484, 13960), (1696, 12215), (1745, 11872), (1855, 11168), (2120, 9772), (2443, 8480), (2792, 7420), (2968, 6980), (3490, 5936), (3710, 5584), (4240, 4886)]