21840455

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{2087}}^1$

素因数の和:2135

約数の個数: 32

約数和(自身を含む): 33675264

約数和(自身を除く): 11834809

約数列:

[1, 5, 7, 13, 23, 35, 65, 91, 115, 161, 299, 455, 805, 1495, 2087, 2093, 10435, 10465, 14609, 27131, 48001, 73045, 135655, 189917, 240005, 336007, 624013, 949585, 1680035, 3120065, 4368091, 21840455]

約数ペア:

[(1, 21840455), (5, 4368091), (7, 3120065), (13, 1680035), (23, 949585), (35, 624013), (65, 336007), (91, 240005), (115, 189917), (161, 135655), (299, 73045), (455, 48001), (805, 27131), (1495, 14609), (2087, 10465), (2093, 10435)]