28005579

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 49720320

約数和(自身を除く): 21714741

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 79, 119, 153, 237, 331, 357, 553, 711, 993, 1071, 1343, 1659, 2317, 2979, 4029, 4977, 5627, 6951, 9401, 12087, 16881, 20853, 26149, 28203, 39389, 50643, 78447, 84609, 118167, 183043, 235341, 354501, 444533, 549129, 1333599, 1647387, 3111731, 4000797, 9335193, 28005579]

約数ペア:

[(1, 28005579), (3, 9335193), (7, 4000797), (9, 3111731), (17, 1647387), (21, 1333599), (51, 549129), (63, 444533), (79, 354501), (119, 235341), (153, 183043), (237, 118167), (331, 84609), (357, 78447), (553, 50643), (711, 39389), (993, 28203), (1071, 26149), (1343, 20853), (1659, 16881), (2317, 12087), (2979, 9401), (4029, 6951), (4977, 5627)]