20870968

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 44906400

約数和(自身を除く): 24035432

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 41, 68, 76, 82, 136, 152, 164, 197, 323, 328, 394, 646, 697, 779, 788, 1292, 1394, 1558, 1576, 2584, 2788, 3116, 3349, 3743, 5576, 6232, 6698, 7486, 8077, 13243, 13396, 14972, 16154, 26486, 26792, 29944, 32308, 52972, 63631, 64616, 105944, 127262, 137309, 153463, 254524, 274618, 306926, 509048, 549236, 613852, 1098472, 1227704, 2608871, 5217742, 10435484, 20870968]

約数ペア:

[(1, 20870968), (2, 10435484), (4, 5217742), (8, 2608871), (17, 1227704), (19, 1098472), (34, 613852), (38, 549236), (41, 509048), (68, 306926), (76, 274618), (82, 254524), (136, 153463), (152, 137309), (164, 127262), (197, 105944), (323, 64616), (328, 63631), (394, 52972), (646, 32308), (697, 29944), (779, 26792), (788, 26486), (1292, 16154), (1394, 14972), (1558, 13396), (1576, 13243), (2584, 8077), (2788, 7486), (3116, 6698), (3349, 6232), (3743, 5576)]