21499785

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 39207168

約数和(自身を除く): 17707383

約数列:

[1, 3, 5, 9, 15, 41, 43, 45, 123, 129, 205, 215, 271, 369, 387, 615, 645, 813, 1355, 1763, 1845, 1935, 2439, 4065, 5289, 8815, 11111, 11653, 12195, 15867, 26445, 33333, 34959, 55555, 58265, 79335, 99999, 104877, 166665, 174795, 477773, 499995, 524385, 1433319, 2388865, 4299957, 7166595, 21499785]

約数ペア:

[(1, 21499785), (3, 7166595), (5, 4299957), (9, 2388865), (15, 1433319), (41, 524385), (43, 499995), (45, 477773), (123, 174795), (129, 166665), (205, 104877), (215, 99999), (271, 79335), (369, 58265), (387, 55555), (615, 34959), (645, 33333), (813, 26445), (1355, 15867), (1763, 12195), (1845, 11653), (1935, 11111), (2439, 8815), (4065, 5289)]