20815676955

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{641}}^1\times {\mathrm{1999}}^1$

素因数の和:2689

約数の個数: 72

約数和(自身を含む): 38157912000

約数和(自身を除く): 17342235045

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 361, 641, 855, 1083, 1805, 1923, 1999, 3205, 3249, 5415, 5769, 5997, 9615, 9995, 12179, 16245, 17991, 28845, 29985, 36537, 37981, 60895, 89955, 109611, 113943, 182685, 189905, 231401, 341829, 548055, 569715, 694203, 721639, 1157005, 1281359, 1709145, 2082609, 2164917, 3471015, 3608195, 3844077, 6406795, 6494751, 10413045, 10824585, 11532231, 19220385, 24345821, 32473755, 57661155, 73037463, 121729105, 219112389, 365187315, 462570599, 1095561945, 1387711797, 2312852995, 4163135391, 6938558985, 20815676955]

約数ペア:

[(1, 20815676955), (3, 6938558985), (5, 4163135391), (9, 2312852995), (15, 1387711797), (19, 1095561945), (45, 462570599), (57, 365187315), (95, 219112389), (171, 121729105), (285, 73037463), (361, 57661155), (641, 32473755), (855, 24345821), (1083, 19220385), (1805, 11532231), (1923, 10824585), (1999, 10413045), (3205, 6494751), (3249, 6406795), (5415, 3844077), (5769, 3608195), (5997, 3471015), (9615, 2164917), (9995, 2082609), (12179, 1709145), (16245, 1281359), (17991, 1157005), (28845, 721639), (29985, 694203), (36537, 569715), (37981, 548055), (60895, 341829), (89955, 231401), (109611, 189905), (113943, 182685)]