21481628

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{271}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 45696000

約数和(自身を除く): 24214372

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 149, 266, 271, 298, 532, 542, 596, 1043, 1084, 1897, 2086, 2831, 3794, 4172, 5149, 5662, 7588, 10298, 11324, 19817, 20596, 36043, 39634, 40379, 72086, 79268, 80758, 144172, 161516, 282653, 565306, 767201, 1130612, 1534402, 3068804, 5370407, 10740814, 21481628]

約数ペア:

[(1, 21481628), (2, 10740814), (4, 5370407), (7, 3068804), (14, 1534402), (19, 1130612), (28, 767201), (38, 565306), (76, 282653), (133, 161516), (149, 144172), (266, 80758), (271, 79268), (298, 72086), (532, 40379), (542, 39634), (596, 36043), (1043, 20596), (1084, 19817), (1897, 11324), (2086, 10298), (2831, 7588), (3794, 5662), (4172, 5149)]