19970288

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1433}}^1$

素因数の和:1521

約数の個数: 40

約数和(自身を含む): 42320208

約数和(自身を除く): 22349920

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1433, 1742, 2866, 3484, 5732, 6968, 11464, 13936, 18629, 22928, 37258, 74516, 96011, 149032, 192022, 298064, 384044, 768088, 1248143, 1536176, 2496286, 4992572, 9985144, 19970288]

約数ペア:

[(1, 19970288), (2, 9985144), (4, 4992572), (8, 2496286), (13, 1536176), (16, 1248143), (26, 768088), (52, 384044), (67, 298064), (104, 192022), (134, 149032), (208, 96011), (268, 74516), (536, 37258), (871, 22928), (1072, 18629), (1433, 13936), (1742, 11464), (2866, 6968), (3484, 5732)]