21013768

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 42826500

約数和(自身を除く): 21812732

約数列:

[1, 2, 4, 8, 17, 34, 61, 68, 122, 136, 149, 244, 289, 298, 488, 578, 596, 1037, 1156, 1192, 2074, 2312, 2533, 4148, 5066, 8296, 9089, 10132, 17629, 18178, 20264, 35258, 36356, 43061, 70516, 72712, 86122, 141032, 154513, 172244, 309026, 344488, 618052, 1236104, 2626721, 5253442, 10506884, 21013768]

約数ペア:

[(1, 21013768), (2, 10506884), (4, 5253442), (8, 2626721), (17, 1236104), (34, 618052), (61, 344488), (68, 309026), (122, 172244), (136, 154513), (149, 141032), (244, 86122), (289, 72712), (298, 70516), (488, 43061), (578, 36356), (596, 35258), (1037, 20264), (1156, 18178), (1192, 17629), (2074, 10132), (2312, 9089), (2533, 8296), (4148, 5066)]