20508904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:242

約数の個数: 64

約数和(自身を含む): 44452800

約数和(自身を除く): 23943896

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 97, 104, 107, 152, 194, 214, 247, 388, 428, 494, 776, 856, 988, 1261, 1391, 1843, 1976, 2033, 2522, 2782, 3686, 4066, 5044, 5564, 7372, 8132, 10088, 10379, 11128, 14744, 16264, 20758, 23959, 26429, 41516, 47918, 52858, 83032, 95836, 105716, 134927, 191672, 197201, 211432, 269854, 394402, 539708, 788804, 1079416, 1577608, 2563613, 5127226, 10254452, 20508904]

約数ペア:

[(1, 20508904), (2, 10254452), (4, 5127226), (8, 2563613), (13, 1577608), (19, 1079416), (26, 788804), (38, 539708), (52, 394402), (76, 269854), (97, 211432), (104, 197201), (107, 191672), (152, 134927), (194, 105716), (214, 95836), (247, 83032), (388, 52858), (428, 47918), (494, 41516), (776, 26429), (856, 23959), (988, 20758), (1261, 16264), (1391, 14744), (1843, 11128), (1976, 10379), (2033, 10088), (2522, 8132), (2782, 7372), (3686, 5564), (4066, 5044)]