18994072

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:224

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 21325928

約数列:

[1, 2, 4, 8, 19, 29, 31, 38, 58, 62, 76, 116, 124, 139, 152, 232, 248, 278, 551, 556, 589, 899, 1102, 1112, 1178, 1798, 2204, 2356, 2641, 3596, 4031, 4309, 4408, 4712, 5282, 7192, 8062, 8618, 10564, 16124, 17081, 17236, 21128, 32248, 34162, 34472, 68324, 76589, 81871, 124961, 136648, 153178, 163742, 249922, 306356, 327484, 499844, 612712, 654968, 999688, 2374259, 4748518, 9497036, 18994072]

約数ペア:

[(1, 18994072), (2, 9497036), (4, 4748518), (8, 2374259), (19, 999688), (29, 654968), (31, 612712), (38, 499844), (58, 327484), (62, 306356), (76, 249922), (116, 163742), (124, 153178), (139, 136648), (152, 124961), (232, 81871), (248, 76589), (278, 68324), (551, 34472), (556, 34162), (589, 32248), (899, 21128), (1102, 17236), (1112, 17081), (1178, 16124), (1798, 10564), (2204, 8618), (2356, 8062), (2641, 7192), (3596, 5282), (4031, 4712), (4309, 4408)]