20520705

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{547}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 34247808

約数和(自身を除く): 13727103

約数列:

[1, 3, 5, 15, 41, 61, 123, 183, 205, 305, 547, 615, 915, 1641, 2501, 2735, 7503, 8205, 12505, 22427, 33367, 37515, 67281, 100101, 112135, 166835, 336405, 500505, 1368047, 4104141, 6840235, 20520705]

約数ペア:

[(1, 20520705), (3, 6840235), (5, 4104141), (15, 1368047), (41, 500505), (61, 336405), (123, 166835), (183, 112135), (205, 100101), (305, 67281), (547, 37515), (615, 33367), (915, 22427), (1641, 12505), (2501, 8205), (2735, 7503)]