21204428

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 43868160

約数和(自身を除く): 22663732

約数列:

[1, 2, 4, 7, 14, 28, 67, 89, 127, 134, 178, 254, 268, 356, 469, 508, 623, 889, 938, 1246, 1778, 1876, 2492, 3556, 5963, 8509, 11303, 11926, 17018, 22606, 23852, 34036, 41741, 45212, 59563, 79121, 83482, 119126, 158242, 166964, 238252, 316484, 757301, 1514602, 3029204, 5301107, 10602214, 21204428]

約数ペア:

[(1, 21204428), (2, 10602214), (4, 5301107), (7, 3029204), (14, 1514602), (28, 757301), (67, 316484), (89, 238252), (127, 166964), (134, 158242), (178, 119126), (254, 83482), (268, 79121), (356, 59563), (469, 45212), (508, 41741), (623, 34036), (889, 23852), (938, 22606), (1246, 17018), (1778, 11926), (1876, 11303), (2492, 8509), (3556, 5963)]