21743407

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:271

約数の個数: 24

約数和(自身を含む): 26429760

約数和(自身を除く): 4686353

約数列:

[1, 7, 41, 49, 79, 137, 287, 553, 959, 2009, 3239, 3871, 5617, 6713, 10823, 22673, 39319, 75761, 158711, 275233, 443743, 530327, 3106201, 21743407]

約数ペア:

[(1, 21743407), (7, 3106201), (41, 530327), (49, 443743), (79, 275233), (137, 158711), (287, 75761), (553, 39319), (959, 22673), (2009, 10823), (3239, 6713), (3871, 5617)]