21353541

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{421}}^1$

素因数の和:517

約数の個数: 32

約数和(自身を含む): 32814720

約数和(自身を除く): 11461179

約数列:

[1, 3, 11, 29, 33, 53, 87, 159, 319, 421, 583, 957, 1263, 1537, 1749, 4611, 4631, 12209, 13893, 16907, 22313, 36627, 50721, 66939, 134299, 245443, 402897, 647077, 736329, 1941231, 7117847, 21353541]

約数ペア:

[(1, 21353541), (3, 7117847), (11, 1941231), (29, 736329), (33, 647077), (53, 402897), (87, 245443), (159, 134299), (319, 66939), (421, 50721), (583, 36627), (957, 22313), (1263, 16907), (1537, 13893), (1749, 12209), (4611, 4631)]