19917990508

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{107}}^1\times {\mathrm{509}}^1\times {\mathrm{541}}^1$

素因数の和:1187

約数の個数: 72

約数和(自身を含む): 38242154160

約数和(自身を除く): 18324163652

約数列:

[1, 2, 4, 13, 26, 52, 107, 169, 214, 338, 428, 509, 541, 676, 1018, 1082, 1391, 2036, 2164, 2782, 5564, 6617, 7033, 13234, 14066, 18083, 26468, 28132, 36166, 54463, 57887, 72332, 86021, 91429, 108926, 115774, 172042, 182858, 217852, 231548, 275369, 344084, 365716, 550738, 708019, 752531, 1101476, 1416038, 1505062, 2832076, 3010124, 3579797, 7159594, 9204247, 9782903, 14319188, 18408494, 19565806, 29464483, 36816988, 39131612, 46537361, 58928966, 93074722, 117857932, 186149444, 383038279, 766076558, 1532153116, 4979497627, 9958995254, 19917990508]

約数ペア:

[(1, 19917990508), (2, 9958995254), (4, 4979497627), (13, 1532153116), (26, 766076558), (52, 383038279), (107, 186149444), (169, 117857932), (214, 93074722), (338, 58928966), (428, 46537361), (509, 39131612), (541, 36816988), (676, 29464483), (1018, 19565806), (1082, 18408494), (1391, 14319188), (2036, 9782903), (2164, 9204247), (2782, 7159594), (5564, 3579797), (6617, 3010124), (7033, 2832076), (13234, 1505062), (14066, 1416038), (18083, 1101476), (26468, 752531), (28132, 708019), (36166, 550738), (54463, 365716), (57887, 344084), (72332, 275369), (86021, 231548), (91429, 217852), (108926, 182858), (115774, 172042)]