21403731

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 32099328

約数和(自身を除く): 10695597

約数列:

[1, 3, 17, 23, 51, 69, 71, 213, 257, 391, 771, 1173, 1207, 1633, 3621, 4369, 4899, 5911, 13107, 17733, 18247, 27761, 54741, 83283, 100487, 301461, 310199, 419681, 930597, 1259043, 7134577, 21403731]

約数ペア:

[(1, 21403731), (3, 7134577), (17, 1259043), (23, 930597), (51, 419681), (69, 310199), (71, 301461), (213, 100487), (257, 83283), (391, 54741), (771, 27761), (1173, 18247), (1207, 17733), (1633, 13107), (3621, 5911), (4369, 4899)]