21179205

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{359}}^1$

素因数の和:415

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 20292795

約数列:

[1, 3, 5, 9, 15, 19, 23, 27, 45, 57, 69, 95, 115, 135, 171, 207, 285, 345, 359, 437, 513, 621, 855, 1035, 1077, 1311, 1795, 2185, 2565, 3105, 3231, 3933, 5385, 6555, 6821, 8257, 9693, 11799, 16155, 19665, 20463, 24771, 34105, 41285, 48465, 58995, 61389, 74313, 102315, 123855, 156883, 184167, 222939, 306945, 371565, 470649, 784415, 920835, 1114695, 1411947, 2353245, 4235841, 7059735, 21179205]

約数ペア:

[(1, 21179205), (3, 7059735), (5, 4235841), (9, 2353245), (15, 1411947), (19, 1114695), (23, 920835), (27, 784415), (45, 470649), (57, 371565), (69, 306945), (95, 222939), (115, 184167), (135, 156883), (171, 123855), (207, 102315), (285, 74313), (345, 61389), (359, 58995), (437, 48465), (513, 41285), (621, 34105), (855, 24771), (1035, 20463), (1077, 19665), (1311, 16155), (1795, 11799), (2185, 9693), (2565, 8257), (3105, 6821), (3231, 6555), (3933, 5385)]