20215251

素因数分解:

$3^4\times 7^1\times {\mathrm{101}}^1\times {\mathrm{353}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 34952544

約数和(自身を除く): 14737293

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 101, 189, 303, 353, 567, 707, 909, 1059, 2121, 2471, 2727, 3177, 6363, 7413, 8181, 9531, 19089, 22239, 28593, 35653, 57267, 66717, 106959, 200151, 249571, 320877, 748713, 962631, 2246139, 2887893, 6738417, 20215251]

約数ペア:

[(1, 20215251), (3, 6738417), (7, 2887893), (9, 2246139), (21, 962631), (27, 748713), (63, 320877), (81, 249571), (101, 200151), (189, 106959), (303, 66717), (353, 57267), (567, 35653), (707, 28593), (909, 22239), (1059, 19089), (2121, 9531), (2471, 8181), (2727, 7413), (3177, 6363)]