21290770

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{191}}^1$

素因数の和:426

約数の個数: 32

約数和(自身を含む): 39315456

約数和(自身を除く): 18024686

約数列:

[1, 2, 5, 10, 71, 142, 157, 191, 314, 355, 382, 710, 785, 955, 1570, 1910, 11147, 13561, 22294, 27122, 29987, 55735, 59974, 67805, 111470, 135610, 149935, 299870, 2129077, 4258154, 10645385, 21290770]

約数ペア:

[(1, 21290770), (2, 10645385), (5, 4258154), (10, 2129077), (71, 299870), (142, 149935), (157, 135610), (191, 111470), (314, 67805), (355, 59974), (382, 55735), (710, 29987), (785, 27122), (955, 22294), (1570, 13561), (1910, 11147)]