21685744

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1307}}^1$

素因数の和:1393

約数の個数: 40

約数和(自身を含む): 45251568

約数和(自身を除く): 23565824

約数列:

[1, 2, 4, 8, 16, 17, 34, 61, 68, 122, 136, 244, 272, 488, 976, 1037, 1307, 2074, 2614, 4148, 5228, 8296, 10456, 16592, 20912, 22219, 44438, 79727, 88876, 159454, 177752, 318908, 355504, 637816, 1275632, 1355359, 2710718, 5421436, 10842872, 21685744]

約数ペア:

[(1, 21685744), (2, 10842872), (4, 5421436), (8, 2710718), (16, 1355359), (17, 1275632), (34, 637816), (61, 355504), (68, 318908), (122, 177752), (136, 159454), (244, 88876), (272, 79727), (488, 44438), (976, 22219), (1037, 20912), (1307, 16592), (2074, 10456), (2614, 8296), (4148, 5228)]