21648405

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{479}}^1$

素因数の和:641

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 14846955

約数列:

[1, 3, 5, 15, 23, 69, 115, 131, 345, 393, 479, 655, 1437, 1965, 2395, 3013, 7185, 9039, 11017, 15065, 33051, 45195, 55085, 62749, 165255, 188247, 313745, 941235, 1443227, 4329681, 7216135, 21648405]

約数ペア:

[(1, 21648405), (3, 7216135), (5, 4329681), (15, 1443227), (23, 941235), (69, 313745), (115, 188247), (131, 165255), (345, 62749), (393, 55085), (479, 45195), (655, 33051), (1437, 15065), (1965, 11017), (2395, 9039), (3013, 7185)]