21175484

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{653}}^1$

素因数の和:746

約数の個数: 36

約数和(自身を含む): 41403432

約数和(自身を除く): 20227948

約数列:

[1, 2, 4, 11, 22, 44, 67, 121, 134, 242, 268, 484, 653, 737, 1306, 1474, 2612, 2948, 7183, 8107, 14366, 16214, 28732, 32428, 43751, 79013, 87502, 158026, 175004, 316052, 481261, 962522, 1925044, 5293871, 10587742, 21175484]

約数ペア:

[(1, 21175484), (2, 10587742), (4, 5293871), (11, 1925044), (22, 962522), (44, 481261), (67, 316052), (121, 175004), (134, 158026), (242, 87502), (268, 79013), (484, 43751), (653, 32428), (737, 28732), (1306, 16214), (1474, 14366), (2612, 8107), (2948, 7183)]