21000718544

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{461}}^1\times {\mathrm{11527}}^1$

素因数の和:12028

約数の個数: 80

約数和(自身を含む): 46229124480

約数和(自身を除く): 25228405936

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 461, 494, 922, 988, 1844, 1976, 3688, 3952, 5993, 7376, 8759, 11527, 11986, 17518, 23054, 23972, 35036, 46108, 47944, 70072, 92216, 95888, 113867, 140144, 149851, 184432, 219013, 227734, 299702, 438026, 455468, 599404, 876052, 910936, 1198808, 1752104, 1821872, 2397616, 2847169, 3504208, 5313947, 5694338, 10627894, 11388676, 21255788, 22777352, 42511576, 45554704, 69081311, 85023152, 100964993, 138162622, 201929986, 276325244, 403859972, 552650488, 807719944, 1105300976, 1312544909, 1615439888, 2625089818, 5250179636, 10500359272, 21000718544]

約数ペア:

[(1, 21000718544), (2, 10500359272), (4, 5250179636), (8, 2625089818), (13, 1615439888), (16, 1312544909), (19, 1105300976), (26, 807719944), (38, 552650488), (52, 403859972), (76, 276325244), (104, 201929986), (152, 138162622), (208, 100964993), (247, 85023152), (304, 69081311), (461, 45554704), (494, 42511576), (922, 22777352), (988, 21255788), (1844, 11388676), (1976, 10627894), (3688, 5694338), (3952, 5313947), (5993, 3504208), (7376, 2847169), (8759, 2397616), (11527, 1821872), (11986, 1752104), (17518, 1198808), (23054, 910936), (23972, 876052), (35036, 599404), (46108, 455468), (47944, 438026), (70072, 299702), (92216, 227734), (95888, 219013), (113867, 184432), (140144, 149851)]