20421352

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1129}}^1$

素因数の和:1178

約数の個数: 64

約数和(自身を含む): 48816000

約数和(自身を除く): 28394648

約数列:

[1, 2, 4, 7, 8, 14, 17, 19, 28, 34, 38, 56, 68, 76, 119, 133, 136, 152, 238, 266, 323, 476, 532, 646, 952, 1064, 1129, 1292, 2258, 2261, 2584, 4516, 4522, 7903, 9032, 9044, 15806, 18088, 19193, 21451, 31612, 38386, 42902, 63224, 76772, 85804, 134351, 150157, 153544, 171608, 268702, 300314, 364667, 537404, 600628, 729334, 1074808, 1201256, 1458668, 2552669, 2917336, 5105338, 10210676, 20421352]

約数ペア:

[(1, 20421352), (2, 10210676), (4, 5105338), (7, 2917336), (8, 2552669), (14, 1458668), (17, 1201256), (19, 1074808), (28, 729334), (34, 600628), (38, 537404), (56, 364667), (68, 300314), (76, 268702), (119, 171608), (133, 153544), (136, 150157), (152, 134351), (238, 85804), (266, 76772), (323, 63224), (476, 42902), (532, 38386), (646, 31612), (952, 21451), (1064, 19193), (1129, 18088), (1292, 15806), (2258, 9044), (2261, 9032), (2584, 7903), (4516, 4522)]