21901015

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 7958825

約数列:

[1, 5, 17, 19, 71, 85, 95, 191, 323, 355, 955, 1207, 1349, 1615, 3247, 3629, 6035, 6745, 13561, 16235, 18145, 22933, 61693, 67805, 114665, 230537, 257659, 308465, 1152685, 1288295, 4380203, 21901015]

約数ペア:

[(1, 21901015), (5, 4380203), (17, 1288295), (19, 1152685), (71, 308465), (85, 257659), (95, 230537), (191, 114665), (323, 67805), (355, 61693), (955, 22933), (1207, 18145), (1349, 16235), (1615, 13561), (3247, 6745), (3629, 6035)]