21118356

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{463}}^1$

素因数の和:661

約数の個数: 72

約数和(自身を含む): 61478144

約数和(自身を除く): 40359788

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 181, 252, 362, 463, 543, 724, 926, 1086, 1267, 1389, 1629, 1852, 2172, 2534, 2778, 3241, 3258, 3801, 4167, 5068, 5556, 6482, 6516, 7602, 8334, 9723, 11403, 12964, 15204, 16668, 19446, 22806, 29169, 38892, 45612, 58338, 83803, 116676, 167606, 251409, 335212, 502818, 586621, 754227, 1005636, 1173242, 1508454, 1759863, 2346484, 3016908, 3519726, 5279589, 7039452, 10559178, 21118356]

約数ペア:

[(1, 21118356), (2, 10559178), (3, 7039452), (4, 5279589), (6, 3519726), (7, 3016908), (9, 2346484), (12, 1759863), (14, 1508454), (18, 1173242), (21, 1005636), (28, 754227), (36, 586621), (42, 502818), (63, 335212), (84, 251409), (126, 167606), (181, 116676), (252, 83803), (362, 58338), (463, 45612), (543, 38892), (724, 29169), (926, 22806), (1086, 19446), (1267, 16668), (1389, 15204), (1629, 12964), (1852, 11403), (2172, 9723), (2534, 8334), (2778, 7602), (3241, 6516), (3258, 6482), (3801, 5556), (4167, 5068)]