221943393

素因数分解:

$3^2\times 7^2\times {\mathrm{613}}^1\times {\mathrm{821}}^1$

素因数の和:1454

約数の個数: 36

約数和(自身を含む): 373988628

約数和(自身を除く): 152045235

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 613, 821, 1839, 2463, 4291, 5517, 5747, 7389, 12873, 17241, 30037, 38619, 40229, 51723, 90111, 120687, 270333, 362061, 503273, 1509819, 3522911, 4529457, 10568733, 24660377, 31706199, 73981131, 221943393]

約数ペア:

[(1, 221943393), (3, 73981131), (7, 31706199), (9, 24660377), (21, 10568733), (49, 4529457), (63, 3522911), (147, 1509819), (441, 503273), (613, 362061), (821, 270333), (1839, 120687), (2463, 90111), (4291, 51723), (5517, 40229), (5747, 38619), (7389, 30037), (12873, 17241)]