20017257

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 29836800

約数和(自身を除く): 9819543

約数列:

[1, 3, 13, 39, 73, 79, 89, 219, 237, 267, 949, 1027, 1157, 2847, 3081, 3471, 5767, 6497, 7031, 17301, 19491, 21093, 74971, 84461, 91403, 224913, 253383, 274209, 513263, 1539789, 6672419, 20017257]

約数ペア:

[(1, 20017257), (3, 6672419), (13, 1539789), (39, 513263), (73, 274209), (79, 253383), (89, 224913), (219, 91403), (237, 84461), (267, 74971), (949, 21093), (1027, 19491), (1157, 17301), (2847, 7031), (3081, 6497), (3471, 5767)]