21427551

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:376

約数の個数: 32

約数和(自身を含む): 33105600

約数和(自身を除く): 11678049

約数列:

[1, 3, 9, 27, 37, 89, 111, 241, 267, 333, 723, 801, 999, 2169, 2403, 3293, 6507, 8917, 9879, 21449, 26751, 29637, 64347, 80253, 88911, 193041, 240759, 579123, 793613, 2380839, 7142517, 21427551]

約数ペア:

[(1, 21427551), (3, 7142517), (9, 2380839), (27, 793613), (37, 579123), (89, 240759), (111, 193041), (241, 88911), (267, 80253), (333, 64347), (723, 29637), (801, 26751), (999, 21449), (2169, 9879), (2403, 8917), (3293, 6507)]