21123494

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:428

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 16201306

約数列:

[1, 2, 7, 14, 71, 79, 142, 158, 269, 497, 538, 553, 994, 1106, 1883, 3766, 5609, 11218, 19099, 21251, 38198, 39263, 42502, 78526, 133693, 148757, 267386, 297514, 1508821, 3017642, 10561747, 21123494]

約数ペア:

[(1, 21123494), (2, 10561747), (7, 3017642), (14, 1508821), (71, 297514), (79, 267386), (142, 148757), (158, 133693), (269, 78526), (497, 42502), (538, 39263), (553, 38198), (994, 21251), (1106, 19099), (1883, 11218), (3766, 5609)]