21102008

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{138829}}^1$

素因数の和:138854

約数の個数: 16

約数和(自身を含む): 41649000

約数和(自身を除く): 20546992

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 138829, 277658, 555316, 1110632, 2637751, 5275502, 10551004, 21102008]

約数ペア:

[(1, 21102008), (2, 10551004), (4, 5275502), (8, 2637751), (19, 1110632), (38, 555316), (76, 277658), (152, 138829)]