20710456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:308

約数の個数: 64

約数和(自身を含む): 45158400

約数和(自身を除く): 24447944

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 47, 52, 76, 94, 104, 152, 188, 223, 247, 376, 446, 494, 611, 892, 893, 988, 1222, 1784, 1786, 1976, 2444, 2899, 3572, 4237, 4888, 5798, 7144, 8474, 10481, 11596, 11609, 16948, 20962, 23192, 23218, 33896, 41924, 46436, 55081, 83848, 92872, 110162, 136253, 199139, 220324, 272506, 398278, 440648, 545012, 796556, 1090024, 1593112, 2588807, 5177614, 10355228, 20710456]

約数ペア:

[(1, 20710456), (2, 10355228), (4, 5177614), (8, 2588807), (13, 1593112), (19, 1090024), (26, 796556), (38, 545012), (47, 440648), (52, 398278), (76, 272506), (94, 220324), (104, 199139), (152, 136253), (188, 110162), (223, 92872), (247, 83848), (376, 55081), (446, 46436), (494, 41924), (611, 33896), (892, 23218), (893, 23192), (988, 20962), (1222, 16948), (1784, 11609), (1786, 11596), (1976, 10481), (2444, 8474), (2899, 7144), (3572, 5798), (4237, 4888)]