21988016

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{479}}^1$

素因数の和:657

約数の個数: 40

約数和(自身を含む): 45235200

約数和(自身を除く): 23247184

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 151, 152, 302, 304, 479, 604, 958, 1208, 1916, 2416, 2869, 3832, 5738, 7664, 9101, 11476, 18202, 22952, 36404, 45904, 72329, 72808, 144658, 145616, 289316, 578632, 1157264, 1374251, 2748502, 5497004, 10994008, 21988016]

約数ペア:

[(1, 21988016), (2, 10994008), (4, 5497004), (8, 2748502), (16, 1374251), (19, 1157264), (38, 578632), (76, 289316), (151, 145616), (152, 144658), (302, 72808), (304, 72329), (479, 45904), (604, 36404), (958, 22952), (1208, 18202), (1916, 11476), (2416, 9101), (2869, 7664), (3832, 5738)]