20199821620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^2\times {\mathrm{571}}^1$

素因数の和:1393

約数の個数: 72

約数和(自身を含む): 46472890464

約数和(自身を除く): 26273068844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 401, 571, 802, 1142, 1604, 2005, 2284, 2855, 4010, 4411, 5710, 6281, 8020, 8822, 11420, 12562, 17644, 22055, 25124, 31405, 44110, 62810, 88220, 125620, 160801, 228971, 321602, 457942, 643204, 804005, 915884, 1144855, 1608010, 1768811, 2289710, 2518681, 3216020, 3537622, 4579420, 5037362, 7075244, 8844055, 10074724, 12593405, 17688110, 25186810, 35376220, 50373620, 91817371, 183634742, 367269484, 459086855, 918173710, 1009991081, 1836347420, 2019982162, 4039964324, 5049955405, 10099910810, 20199821620]

約数ペア:

[(1, 20199821620), (2, 10099910810), (4, 5049955405), (5, 4039964324), (10, 2019982162), (11, 1836347420), (20, 1009991081), (22, 918173710), (44, 459086855), (55, 367269484), (110, 183634742), (220, 91817371), (401, 50373620), (571, 35376220), (802, 25186810), (1142, 17688110), (1604, 12593405), (2005, 10074724), (2284, 8844055), (2855, 7075244), (4010, 5037362), (4411, 4579420), (5710, 3537622), (6281, 3216020), (8020, 2518681), (8822, 2289710), (11420, 1768811), (12562, 1608010), (17644, 1144855), (22055, 915884), (25124, 804005), (31405, 643204), (44110, 457942), (62810, 321602), (88220, 228971), (125620, 160801)]