661838639

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{271}}^1$

素因数の和:516

約数の個数: 48

約数和(自身を含む): 884100096

約数和(自身を除く): 222261457

約数列:

[1, 7, 11, 23, 49, 77, 161, 197, 253, 271, 539, 1127, 1379, 1771, 1897, 2167, 2981, 4531, 6233, 9653, 12397, 13279, 15169, 20867, 31717, 43631, 49841, 53387, 68563, 106183, 146069, 222019, 305417, 348887, 373709, 479941, 587257, 1227901, 2442209, 2615963, 3359587, 4110799, 8595307, 13506911, 28775593, 60167149, 94548377, 661838639]

約数ペア:

[(1, 661838639), (7, 94548377), (11, 60167149), (23, 28775593), (49, 13506911), (77, 8595307), (161, 4110799), (197, 3359587), (253, 2615963), (271, 2442209), (539, 1227901), (1127, 587257), (1379, 479941), (1771, 373709), (1897, 348887), (2167, 305417), (2981, 222019), (4531, 146069), (6233, 106183), (9653, 68563), (12397, 53387), (13279, 49841), (15169, 43631), (20867, 31717)]