19640075

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 30623040

約数和(自身を除く): 10982965

約数列:

[1, 5, 7, 13, 25, 35, 65, 89, 91, 97, 175, 325, 445, 455, 485, 623, 679, 1157, 1261, 2225, 2275, 2425, 3115, 3395, 5785, 6305, 8099, 8633, 8827, 15575, 16975, 28925, 31525, 40495, 43165, 44135, 60431, 112229, 202475, 215825, 220675, 302155, 561145, 785603, 1510775, 2805725, 3928015, 19640075]

約数ペア:

[(1, 19640075), (5, 3928015), (7, 2805725), (13, 1510775), (25, 785603), (35, 561145), (65, 302155), (89, 220675), (91, 215825), (97, 202475), (175, 112229), (325, 60431), (445, 44135), (455, 43165), (485, 40495), (623, 31525), (679, 28925), (1157, 16975), (1261, 15575), (2225, 8827), (2275, 8633), (2425, 8099), (3115, 6305), (3395, 5785)]