19802704

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{269}}^1$

素因数の和:427

約数の個数: 40

約数和(自身を含む): 39774240

約数和(自身を除く): 19971536

約数列:

[1, 2, 4, 8, 16, 43, 86, 107, 172, 214, 269, 344, 428, 538, 688, 856, 1076, 1712, 2152, 4304, 4601, 9202, 11567, 18404, 23134, 28783, 36808, 46268, 57566, 73616, 92536, 115132, 185072, 230264, 460528, 1237669, 2475338, 4950676, 9901352, 19802704]

約数ペア:

[(1, 19802704), (2, 9901352), (4, 4950676), (8, 2475338), (16, 1237669), (43, 460528), (86, 230264), (107, 185072), (172, 115132), (214, 92536), (269, 73616), (344, 57566), (428, 46268), (538, 36808), (688, 28783), (856, 23134), (1076, 18404), (1712, 11567), (2152, 9202), (4304, 4601)]