21655995

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1531}}^1$

素因数の和:1603

約数の個数: 32

約数和(自身を含む): 37062144

約数和(自身を除く): 15406149

約数列:

[1, 3, 5, 15, 23, 41, 69, 115, 123, 205, 345, 615, 943, 1531, 2829, 4593, 4715, 7655, 14145, 22965, 35213, 62771, 105639, 176065, 188313, 313855, 528195, 941565, 1443733, 4331199, 7218665, 21655995]

約数ペア:

[(1, 21655995), (3, 7218665), (5, 4331199), (15, 1443733), (23, 941565), (41, 528195), (69, 313855), (115, 188313), (123, 176065), (205, 105639), (345, 62771), (615, 35213), (943, 22965), (1531, 14145), (2829, 7655), (4593, 4715)]