21098415

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{421}}^1$

素因数の和:699

約数の個数: 32

約数和(自身を含む): 36582336

約数和(自身を除く): 15483921

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 257, 421, 771, 1263, 1285, 2105, 3341, 3855, 5473, 6315, 10023, 16419, 16705, 27365, 50115, 82095, 108197, 324591, 540985, 1406561, 1622955, 4219683, 7032805, 21098415]

約数ペア:

[(1, 21098415), (3, 7032805), (5, 4219683), (13, 1622955), (15, 1406561), (39, 540985), (65, 324591), (195, 108197), (257, 82095), (421, 50115), (771, 27365), (1263, 16705), (1285, 16419), (2105, 10023), (3341, 6315), (3855, 5473)]