21495516

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{263}}^1$

素因数の和:423

約数の個数: 72

約数和(自身を含む): 58988160

約数和(自身を除く): 37492644

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 139, 147, 196, 263, 278, 294, 417, 526, 556, 588, 789, 834, 973, 1052, 1578, 1668, 1841, 1946, 2919, 3156, 3682, 3892, 5523, 5838, 6811, 7364, 11046, 11676, 12887, 13622, 20433, 22092, 25774, 27244, 36557, 38661, 40866, 51548, 73114, 77322, 81732, 109671, 146228, 154644, 219342, 255899, 438684, 511798, 767697, 1023596, 1535394, 1791293, 3070788, 3582586, 5373879, 7165172, 10747758, 21495516]

約数ペア:

[(1, 21495516), (2, 10747758), (3, 7165172), (4, 5373879), (6, 3582586), (7, 3070788), (12, 1791293), (14, 1535394), (21, 1023596), (28, 767697), (42, 511798), (49, 438684), (84, 255899), (98, 219342), (139, 154644), (147, 146228), (196, 109671), (263, 81732), (278, 77322), (294, 73114), (417, 51548), (526, 40866), (556, 38661), (588, 36557), (789, 27244), (834, 25774), (973, 22092), (1052, 20433), (1578, 13622), (1668, 12887), (1841, 11676), (1946, 11046), (2919, 7364), (3156, 6811), (3682, 5838), (3892, 5523)]