21565475

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{547}}^1$

素因数の和:659

約数の個数: 24

約数和(自身を含む): 28539840

約数和(自身を除く): 6974365

約数列:

[1, 5, 19, 25, 83, 95, 415, 475, 547, 1577, 2075, 2735, 7885, 10393, 13675, 39425, 45401, 51965, 227005, 259825, 862619, 1135025, 4313095, 21565475]

約数ペア:

[(1, 21565475), (5, 4313095), (19, 1135025), (25, 862619), (83, 259825), (95, 227005), (415, 51965), (475, 45401), (547, 39425), (1577, 13675), (2075, 10393), (2735, 7885)]