19970816

素因数分解:

$2^8\times {\mathrm{181}}^1\times {\mathrm{431}}^1$

素因数の和:628

約数の個数: 36

約数和(自身を含む): 40176864

約数和(自身を除く): 20206048

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 181, 256, 362, 431, 724, 862, 1448, 1724, 2896, 3448, 5792, 6896, 11584, 13792, 23168, 27584, 46336, 55168, 78011, 110336, 156022, 312044, 624088, 1248176, 2496352, 4992704, 9985408, 19970816]

約数ペア:

[(1, 19970816), (2, 9985408), (4, 4992704), (8, 2496352), (16, 1248176), (32, 624088), (64, 312044), (128, 156022), (181, 110336), (256, 78011), (362, 55168), (431, 46336), (724, 27584), (862, 23168), (1448, 13792), (1724, 11584), (2896, 6896), (3448, 5792)]