19969509

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 33587136

約数和(自身を除く): 13617627

約数列:

[1, 3, 7, 17, 21, 49, 51, 61, 119, 131, 147, 183, 357, 393, 427, 833, 917, 1037, 1281, 2227, 2499, 2751, 2989, 3111, 6419, 6681, 7259, 7991, 8967, 15589, 19257, 21777, 23973, 46767, 50813, 55937, 109123, 135847, 152439, 167811, 327369, 391559, 407541, 950929, 1174677, 2852787, 6656503, 19969509]

約数ペア:

[(1, 19969509), (3, 6656503), (7, 2852787), (17, 1174677), (21, 950929), (49, 407541), (51, 391559), (61, 327369), (119, 167811), (131, 152439), (147, 135847), (183, 109123), (357, 55937), (393, 50813), (427, 46767), (833, 23973), (917, 21777), (1037, 19257), (1281, 15589), (2227, 8967), (2499, 7991), (2751, 7259), (2989, 6681), (3111, 6419)]