21097208

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{1609}}^1$

素因数の和:1775

約数の個数: 32

約数和(自身を含む): 43470000

約数和(自身を除く): 22372792

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 149, 298, 596, 1192, 1609, 1639, 3218, 3278, 6436, 6556, 12872, 13112, 17699, 35398, 70796, 141592, 239741, 479482, 958964, 1917928, 2637151, 5274302, 10548604, 21097208]

約数ペア:

[(1, 21097208), (2, 10548604), (4, 5274302), (8, 2637151), (11, 1917928), (22, 958964), (44, 479482), (88, 239741), (149, 141592), (298, 70796), (596, 35398), (1192, 17699), (1609, 13112), (1639, 12872), (3218, 6556), (3278, 6436)]