19999420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6211}}^1$

素因数の和:6250

約数の個数: 48

約数和(自身を含む): 50093568

約数和(自身を除く): 30094148

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, 6211, 12422, 24844, 31055, 43477, 62110, 86954, 124220, 142853, 173908, 217385, 285706, 434770, 571412, 714265, 869540, 999971, 1428530, 1999942, 2857060, 3999884, 4999855, 9999710, 19999420]

約数ペア:

[(1, 19999420), (2, 9999710), (4, 4999855), (5, 3999884), (7, 2857060), (10, 1999942), (14, 1428530), (20, 999971), (23, 869540), (28, 714265), (35, 571412), (46, 434770), (70, 285706), (92, 217385), (115, 173908), (140, 142853), (161, 124220), (230, 86954), (322, 62110), (460, 43477), (644, 31055), (805, 24844), (1610, 12422), (3220, 6211)]