21754715

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7275685

約数列:

[1, 5, 19, 31, 83, 89, 95, 155, 415, 445, 589, 1577, 1691, 2573, 2759, 2945, 7387, 7885, 8455, 12865, 13795, 36935, 48887, 52421, 140353, 228997, 244435, 262105, 701765, 1144985, 4350943, 21754715]

約数ペア:

[(1, 21754715), (5, 4350943), (19, 1144985), (31, 701765), (83, 262105), (89, 244435), (95, 228997), (155, 140353), (415, 52421), (445, 48887), (589, 36935), (1577, 13795), (1691, 12865), (2573, 8455), (2759, 7885), (2945, 7387)]