20805204

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{863}}^1$

素因数の和:925

約数の個数: 72

約数和(自身を含む): 57915648

約数和(自身を除く): 37110444

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 41, 42, 49, 82, 84, 98, 123, 147, 164, 196, 246, 287, 294, 492, 574, 588, 861, 863, 1148, 1722, 1726, 2009, 2589, 3444, 3452, 4018, 5178, 6027, 6041, 8036, 10356, 12054, 12082, 18123, 24108, 24164, 35383, 36246, 42287, 70766, 72492, 84574, 106149, 126861, 141532, 169148, 212298, 247681, 253722, 424596, 495362, 507444, 743043, 990724, 1486086, 1733767, 2972172, 3467534, 5201301, 6935068, 10402602, 20805204]

約数ペア:

[(1, 20805204), (2, 10402602), (3, 6935068), (4, 5201301), (6, 3467534), (7, 2972172), (12, 1733767), (14, 1486086), (21, 990724), (28, 743043), (41, 507444), (42, 495362), (49, 424596), (82, 253722), (84, 247681), (98, 212298), (123, 169148), (147, 141532), (164, 126861), (196, 106149), (246, 84574), (287, 72492), (294, 70766), (492, 42287), (574, 36246), (588, 35383), (861, 24164), (863, 24108), (1148, 18123), (1722, 12082), (1726, 12054), (2009, 10356), (2589, 8036), (3444, 6041), (3452, 6027), (4018, 5178)]