81403960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^4\times {\mathrm{139}}^1$

素因数の和:194

約数の個数: 80

約数和(自身を含む): 202923000

約数和(自身を除く): 121519040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 139, 220, 242, 278, 440, 484, 556, 605, 695, 968, 1112, 1210, 1331, 1390, 1529, 2420, 2662, 2780, 3058, 4840, 5324, 5560, 6116, 6655, 7645, 10648, 12232, 13310, 14641, 15290, 16819, 26620, 29282, 30580, 33638, 53240, 58564, 61160, 67276, 73205, 84095, 117128, 134552, 146410, 168190, 185009, 292820, 336380, 370018, 585640, 672760, 740036, 925045, 1480072, 1850090, 2035099, 3700180, 4070198, 7400360, 8140396, 10175495, 16280792, 20350990, 40701980, 81403960]

約数ペア:

[(1, 81403960), (2, 40701980), (4, 20350990), (5, 16280792), (8, 10175495), (10, 8140396), (11, 7400360), (20, 4070198), (22, 3700180), (40, 2035099), (44, 1850090), (55, 1480072), (88, 925045), (110, 740036), (121, 672760), (139, 585640), (220, 370018), (242, 336380), (278, 292820), (440, 185009), (484, 168190), (556, 146410), (605, 134552), (695, 117128), (968, 84095), (1112, 73205), (1210, 67276), (1331, 61160), (1390, 58564), (1529, 53240), (2420, 33638), (2662, 30580), (2780, 29282), (3058, 26620), (4840, 16819), (5324, 15290), (5560, 14641), (6116, 13310), (6655, 12232), (7645, 10648)]