21441980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6659}}^1$

素因数の和:6698

約数の個数: 48

約数和(自身を含む): 53706240

約数和(自身を除く): 32264260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6659, 13318, 26636, 33295, 46613, 66590, 93226, 133180, 153157, 186452, 233065, 306314, 466130, 612628, 765785, 932260, 1072099, 1531570, 2144198, 3063140, 4288396, 5360495, 10720990, 21441980]

約数ペア:

[(1, 21441980), (2, 10720990), (4, 5360495), (5, 4288396), (7, 3063140), (10, 2144198), (14, 1531570), (20, 1072099), (23, 932260), (28, 765785), (35, 612628), (46, 466130), (70, 306314), (92, 233065), (115, 186452), (140, 153157), (161, 133180), (230, 93226), (322, 66590), (460, 46613), (644, 33295), (805, 26636), (1610, 13318), (3220, 6659)]