21315135

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1993}}^1$

素因数の和:2055

約数の個数: 32

約数和(自身を含む): 36753408

約数和(自身を除く): 15438273

約数列:

[1, 3, 5, 15, 23, 31, 69, 93, 115, 155, 345, 465, 713, 1993, 2139, 3565, 5979, 9965, 10695, 29895, 45839, 61783, 137517, 185349, 229195, 308915, 687585, 926745, 1421009, 4263027, 7105045, 21315135]

約数ペア:

[(1, 21315135), (3, 7105045), (5, 4263027), (15, 1421009), (23, 926745), (31, 687585), (69, 308915), (93, 229195), (115, 185349), (155, 137517), (345, 61783), (465, 45839), (713, 29895), (1993, 10695), (2139, 9965), (3565, 5979)]