68990320

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{353}}^1$

素因数の和:722

約数の個数: 80

約数和(自身を含む): 184363200

約数和(自身を除く): 115372880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 349, 353, 560, 698, 706, 1396, 1412, 1745, 1765, 2443, 2471, 2792, 2824, 3490, 3530, 4886, 4942, 5584, 5648, 6980, 7060, 9772, 9884, 12215, 12355, 13960, 14120, 19544, 19768, 24430, 24710, 27920, 28240, 39088, 39536, 48860, 49420, 97720, 98840, 123197, 195440, 197680, 246394, 492788, 615985, 862379, 985576, 1231970, 1724758, 1971152, 2463940, 3449516, 4311895, 4927880, 6899032, 8623790, 9855760, 13798064, 17247580, 34495160, 68990320]

約数ペア:

[(1, 68990320), (2, 34495160), (4, 17247580), (5, 13798064), (7, 9855760), (8, 8623790), (10, 6899032), (14, 4927880), (16, 4311895), (20, 3449516), (28, 2463940), (35, 1971152), (40, 1724758), (56, 1231970), (70, 985576), (80, 862379), (112, 615985), (140, 492788), (280, 246394), (349, 197680), (353, 195440), (560, 123197), (698, 98840), (706, 97720), (1396, 49420), (1412, 48860), (1745, 39536), (1765, 39088), (2443, 28240), (2471, 27920), (2792, 24710), (2824, 24430), (3490, 19768), (3530, 19544), (4886, 14120), (4942, 13960), (5584, 12355), (5648, 12215), (6980, 9884), (7060, 9772)]