21957105

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 36391680

約数和(自身を除く): 14434575

約数列:

[1, 3, 5, 15, 53, 71, 159, 213, 265, 355, 389, 795, 1065, 1167, 1945, 3763, 5835, 11289, 18815, 20617, 27619, 56445, 61851, 82857, 103085, 138095, 309255, 414285, 1463807, 4391421, 7319035, 21957105]

約数ペア:

[(1, 21957105), (3, 7319035), (5, 4391421), (15, 1463807), (53, 414285), (71, 309255), (159, 138095), (213, 103085), (265, 82857), (355, 61851), (389, 56445), (795, 27619), (1065, 20617), (1167, 18815), (1945, 11289), (3763, 5835)]