21075028

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 42477120

約数和(自身を除く): 21402092

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 83, 166, 247, 257, 332, 494, 514, 988, 1028, 1079, 1577, 2158, 3154, 3341, 4316, 4883, 6308, 6682, 9766, 13364, 19532, 20501, 21331, 41002, 42662, 63479, 82004, 85324, 126958, 253916, 277303, 405289, 554606, 810578, 1109212, 1621156, 5268757, 10537514, 21075028]

約数ペア:

[(1, 21075028), (2, 10537514), (4, 5268757), (13, 1621156), (19, 1109212), (26, 810578), (38, 554606), (52, 405289), (76, 277303), (83, 253916), (166, 126958), (247, 85324), (257, 82004), (332, 63479), (494, 42662), (514, 41002), (988, 21331), (1028, 20501), (1079, 19532), (1577, 13364), (2158, 9766), (3154, 6682), (3341, 6308), (4316, 4883)]