20888140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{499}}^1$

素因数の和:551

約数の個数: 96

約数和(自身を含む): 56448000

約数和(自身を除く): 35559860

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 26, 28, 35, 46, 52, 65, 70, 91, 92, 115, 130, 140, 161, 182, 230, 260, 299, 322, 364, 455, 460, 499, 598, 644, 805, 910, 998, 1196, 1495, 1610, 1820, 1996, 2093, 2495, 2990, 3220, 3493, 4186, 4990, 5980, 6487, 6986, 8372, 9980, 10465, 11477, 12974, 13972, 17465, 20930, 22954, 25948, 32435, 34930, 41860, 45409, 45908, 57385, 64870, 69860, 80339, 90818, 114770, 129740, 149201, 160678, 181636, 227045, 229540, 298402, 321356, 401695, 454090, 596804, 746005, 803390, 908180, 1044407, 1492010, 1606780, 2088814, 2984020, 4177628, 5222035, 10444070, 20888140]

約数ペア:

[(1, 20888140), (2, 10444070), (4, 5222035), (5, 4177628), (7, 2984020), (10, 2088814), (13, 1606780), (14, 1492010), (20, 1044407), (23, 908180), (26, 803390), (28, 746005), (35, 596804), (46, 454090), (52, 401695), (65, 321356), (70, 298402), (91, 229540), (92, 227045), (115, 181636), (130, 160678), (140, 149201), (161, 129740), (182, 114770), (230, 90818), (260, 80339), (299, 69860), (322, 64870), (364, 57385), (455, 45908), (460, 45409), (499, 41860), (598, 34930), (644, 32435), (805, 25948), (910, 22954), (998, 20930), (1196, 17465), (1495, 13972), (1610, 12974), (1820, 11477), (1996, 10465), (2093, 9980), (2495, 8372), (2990, 6986), (3220, 6487), (3493, 5980), (4186, 4990)]