21115161

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:231

約数の個数: 40

約数和(自身を含む): 33323400

約数和(自身を除く): 12208239

約数列:

[1, 3, 9, 27, 29, 81, 87, 89, 101, 261, 267, 303, 783, 801, 909, 2349, 2403, 2581, 2727, 2929, 7209, 7743, 8181, 8787, 8989, 23229, 26361, 26967, 69687, 79083, 80901, 209061, 237249, 242703, 260681, 728109, 782043, 2346129, 7038387, 21115161]

約数ペア:

[(1, 21115161), (3, 7038387), (9, 2346129), (27, 782043), (29, 728109), (81, 260681), (87, 242703), (89, 237249), (101, 209061), (261, 80901), (267, 79083), (303, 69687), (783, 26967), (801, 26361), (909, 23229), (2349, 8989), (2403, 8787), (2581, 8181), (2727, 7743), (2929, 7209)]