21555664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3343}}^1$

素因数の和:3395

約数の個数: 40

約数和(自身を含む): 46441472

約数和(自身を除く): 24885808

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 3343, 6448, 6686, 13372, 26744, 43459, 53488, 86918, 103633, 173836, 207266, 347672, 414532, 695344, 829064, 1347229, 1658128, 2694458, 5388916, 10777832, 21555664]

約数ペア:

[(1, 21555664), (2, 10777832), (4, 5388916), (8, 2694458), (13, 1658128), (16, 1347229), (26, 829064), (31, 695344), (52, 414532), (62, 347672), (104, 207266), (124, 173836), (208, 103633), (248, 86918), (403, 53488), (496, 43459), (806, 26744), (1612, 13372), (3224, 6686), (3343, 6448)]