20474128

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{269}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 40979520

約数和(自身を除く): 20505392

約数列:

[1, 2, 4, 8, 16, 67, 71, 134, 142, 268, 269, 284, 536, 538, 568, 1072, 1076, 1136, 2152, 4304, 4757, 9514, 18023, 19028, 19099, 36046, 38056, 38198, 72092, 76112, 76396, 144184, 152792, 288368, 305584, 1279633, 2559266, 5118532, 10237064, 20474128]

約数ペア:

[(1, 20474128), (2, 10237064), (4, 5118532), (8, 2559266), (16, 1279633), (67, 305584), (71, 288368), (134, 152792), (142, 144184), (268, 76396), (269, 76112), (284, 72092), (536, 38198), (538, 38056), (568, 36046), (1072, 19099), (1076, 19028), (1136, 18023), (2152, 9514), (4304, 4757)]