19900811

素因数分解:

$7^2\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:243

約数の個数: 24

約数和(自身を含む): 24131520

約数和(自身を除く): 4230709

約数列:

[1, 7, 49, 53, 79, 97, 371, 553, 679, 2597, 3871, 4187, 4753, 5141, 7663, 29309, 35987, 53641, 205163, 251909, 375487, 406139, 2842973, 19900811]

約数ペア:

[(1, 19900811), (7, 2842973), (49, 406139), (53, 375487), (79, 251909), (97, 205163), (371, 53641), (553, 35987), (679, 29309), (2597, 7663), (3871, 5141), (4187, 4753)]