81871405

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1787}}^1$

素因数の和:1834

約数の個数: 48

約数和(自身を含む): 132083136

約数和(自身を除く): 50211731

約数列:

[1, 5, 7, 11, 17, 35, 49, 55, 77, 85, 119, 187, 245, 385, 539, 595, 833, 935, 1309, 1787, 2695, 4165, 6545, 8935, 9163, 12509, 19657, 30379, 45815, 62545, 87563, 98285, 137599, 151895, 212653, 334169, 437815, 687995, 963193, 1063265, 1488571, 1670845, 2339183, 4815965, 7442855, 11695915, 16374281, 81871405]

約数ペア:

[(1, 81871405), (5, 16374281), (7, 11695915), (11, 7442855), (17, 4815965), (35, 2339183), (49, 1670845), (55, 1488571), (77, 1063265), (85, 963193), (119, 687995), (187, 437815), (245, 334169), (385, 212653), (539, 151895), (595, 137599), (833, 98285), (935, 87563), (1309, 62545), (1787, 45815), (2695, 30379), (4165, 19657), (6545, 12509), (8935, 9163)]