19877008

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{167}}^1\times {\mathrm{173}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 39872448

約数和(自身を除く): 19995440

約数列:

[1, 2, 4, 8, 16, 43, 86, 167, 172, 173, 334, 344, 346, 668, 688, 692, 1336, 1384, 2672, 2768, 7181, 7439, 14362, 14878, 28724, 28891, 29756, 57448, 57782, 59512, 114896, 115564, 119024, 231128, 462256, 1242313, 2484626, 4969252, 9938504, 19877008]

約数ペア:

[(1, 19877008), (2, 9938504), (4, 4969252), (8, 2484626), (16, 1242313), (43, 462256), (86, 231128), (167, 119024), (172, 115564), (173, 114896), (334, 59512), (344, 57782), (346, 57448), (668, 29756), (688, 28891), (692, 28724), (1336, 14878), (1384, 14362), (2672, 7439), (2768, 7181)]