21490178

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:282

約数の個数: 32

約数和(自身を含む): 35235840

約数和(自身を除く): 13745662

約数列:

[1, 2, 19, 38, 61, 73, 122, 127, 146, 254, 1159, 1387, 2318, 2413, 2774, 4453, 4826, 7747, 8906, 9271, 15494, 18542, 84607, 147193, 169214, 176149, 294386, 352298, 565531, 1131062, 10745089, 21490178]

約数ペア:

[(1, 21490178), (2, 10745089), (19, 1131062), (38, 565531), (61, 352298), (73, 294386), (122, 176149), (127, 169214), (146, 147193), (254, 84607), (1159, 18542), (1387, 15494), (2318, 9271), (2413, 8906), (2774, 7747), (4453, 4826)]