21388376

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{631}}^1$

素因数の和:879

約数の個数: 32

約数和(自身を含む): 42470400

約数和(自身を除く): 21082024

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 223, 446, 631, 892, 1262, 1784, 2524, 4237, 5048, 8474, 11989, 16948, 23978, 33896, 47956, 95912, 140713, 281426, 562852, 1125704, 2673547, 5347094, 10694188, 21388376]

約数ペア:

[(1, 21388376), (2, 10694188), (4, 5347094), (8, 2673547), (19, 1125704), (38, 562852), (76, 281426), (152, 140713), (223, 95912), (446, 47956), (631, 33896), (892, 23978), (1262, 16948), (1784, 11989), (2524, 8474), (4237, 5048)]