21213015

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61487}}^1$

素因数の和:61518

約数の個数: 16

約数和(自身を含む): 35417088

約数和(自身を除く): 14204073

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61487, 184461, 307435, 922305, 1414201, 4242603, 7071005, 21213015]

約数ペア:

[(1, 21213015), (3, 7071005), (5, 4242603), (15, 1414201), (23, 922305), (69, 307435), (115, 184461), (345, 61487)]