21789304

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{653}}^1$

素因数の和:799

約数の個数: 32

約数和(自身を含む): 42300720

約数和(自身を除く): 20511416

約数列:

[1, 2, 4, 8, 43, 86, 97, 172, 194, 344, 388, 653, 776, 1306, 2612, 4171, 5224, 8342, 16684, 28079, 33368, 56158, 63341, 112316, 126682, 224632, 253364, 506728, 2723663, 5447326, 10894652, 21789304]

約数ペア:

[(1, 21789304), (2, 10894652), (4, 5447326), (8, 2723663), (43, 506728), (86, 253364), (97, 224632), (172, 126682), (194, 112316), (344, 63341), (388, 56158), (653, 33368), (776, 28079), (1306, 16684), (2612, 8342), (4171, 5224)]