20912240

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1511}}^1$

素因数の和:1697

約数の個数: 40

約数和(自身を含む): 48934368

約数和(自身を除く): 28022128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1511, 1730, 2768, 3022, 3460, 6044, 6920, 7555, 12088, 13840, 15110, 24176, 30220, 60440, 120880, 261403, 522806, 1045612, 1307015, 2091224, 2614030, 4182448, 5228060, 10456120, 20912240]

約数ペア:

[(1, 20912240), (2, 10456120), (4, 5228060), (5, 4182448), (8, 2614030), (10, 2091224), (16, 1307015), (20, 1045612), (40, 522806), (80, 261403), (173, 120880), (346, 60440), (692, 30220), (865, 24176), (1384, 15110), (1511, 13840), (1730, 12088), (2768, 7555), (3022, 6920), (3460, 6044)]