20254988

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{19}}^2\times {\mathrm{83}}^1$

素因数の和:151

約数の個数: 54

約数和(自身を含む): 40997124

約数和(自身を除く): 20742136

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 83, 166, 169, 247, 332, 338, 361, 494, 676, 722, 988, 1079, 1444, 1577, 2158, 3154, 3211, 4316, 4693, 6308, 6422, 9386, 12844, 14027, 18772, 20501, 28054, 29963, 41002, 56108, 59926, 61009, 82004, 119852, 122018, 244036, 266513, 389519, 533026, 779038, 1066052, 1558076, 5063747, 10127494, 20254988]

約数ペア:

[(1, 20254988), (2, 10127494), (4, 5063747), (13, 1558076), (19, 1066052), (26, 779038), (38, 533026), (52, 389519), (76, 266513), (83, 244036), (166, 122018), (169, 119852), (247, 82004), (332, 61009), (338, 59926), (361, 56108), (494, 41002), (676, 29963), (722, 28054), (988, 20501), (1079, 18772), (1444, 14027), (1577, 12844), (2158, 9386), (3154, 6422), (3211, 6308), (4316, 4693)]