81147640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{821}}^1$

素因数の和:1192

約数の個数: 64

約数和(自身を含む): 209511360

約数和(自身を除く): 128363720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 353, 706, 821, 1412, 1642, 1765, 2471, 2824, 3284, 3530, 4105, 4942, 5747, 6568, 7060, 8210, 9884, 11494, 12355, 14120, 16420, 19768, 22988, 24710, 28735, 32840, 45976, 49420, 57470, 98840, 114940, 229880, 289813, 579626, 1159252, 1449065, 2028691, 2318504, 2898130, 4057382, 5796260, 8114764, 10143455, 11592520, 16229528, 20286910, 40573820, 81147640]

約数ペア:

[(1, 81147640), (2, 40573820), (4, 20286910), (5, 16229528), (7, 11592520), (8, 10143455), (10, 8114764), (14, 5796260), (20, 4057382), (28, 2898130), (35, 2318504), (40, 2028691), (56, 1449065), (70, 1159252), (140, 579626), (280, 289813), (353, 229880), (706, 114940), (821, 98840), (1412, 57470), (1642, 49420), (1765, 45976), (2471, 32840), (2824, 28735), (3284, 24710), (3530, 22988), (4105, 19768), (4942, 16420), (5747, 14120), (6568, 12355), (7060, 11494), (8210, 9884)]