640940872

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{53}}^1$

素因数の和:156

約数の個数: 144

約数和(自身を含む): 1497662460

約数和(自身を除く): 856721588

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 31, 44, 52, 53, 62, 88, 104, 106, 121, 124, 143, 212, 242, 248, 286, 341, 403, 424, 484, 572, 583, 682, 689, 806, 961, 968, 1144, 1166, 1364, 1378, 1573, 1612, 1643, 1922, 2332, 2728, 2756, 3146, 3224, 3286, 3751, 3844, 4433, 4664, 5512, 6292, 6413, 6572, 7502, 7579, 7688, 8866, 10571, 12493, 12584, 12826, 13144, 15004, 15158, 17732, 18073, 21142, 21359, 24986, 25652, 30008, 30316, 35464, 36146, 42284, 42718, 48763, 49972, 50933, 51304, 60632, 72292, 83369, 84568, 85436, 97526, 99944, 101866, 116281, 137423, 144584, 166738, 170872, 195052, 198803, 203732, 232562, 234949, 274846, 333476, 390104, 397606, 407464, 465124, 469898, 549692, 560263, 662129, 666952, 795212, 930248, 939796, 1099384, 1120526, 1324258, 1511653, 1590424, 1879592, 2241052, 2584439, 2648516, 3023306, 4482104, 5168878, 5297032, 6046612, 6162893, 7283419, 10337756, 12093224, 12325786, 14566838, 20675512, 24651572, 29133676, 49303144, 58267352, 80117609, 160235218, 320470436, 640940872]

約数ペア:

[(1, 640940872), (2, 320470436), (4, 160235218), (8, 80117609), (11, 58267352), (13, 49303144), (22, 29133676), (26, 24651572), (31, 20675512), (44, 14566838), (52, 12325786), (53, 12093224), (62, 10337756), (88, 7283419), (104, 6162893), (106, 6046612), (121, 5297032), (124, 5168878), (143, 4482104), (212, 3023306), (242, 2648516), (248, 2584439), (286, 2241052), (341, 1879592), (403, 1590424), (424, 1511653), (484, 1324258), (572, 1120526), (583, 1099384), (682, 939796), (689, 930248), (806, 795212), (961, 666952), (968, 662129), (1144, 560263), (1166, 549692), (1364, 469898), (1378, 465124), (1573, 407464), (1612, 397606), (1643, 390104), (1922, 333476), (2332, 274846), (2728, 234949), (2756, 232562), (3146, 203732), (3224, 198803), (3286, 195052), (3751, 170872), (3844, 166738), (4433, 144584), (4664, 137423), (5512, 116281), (6292, 101866), (6413, 99944), (6572, 97526), (7502, 85436), (7579, 84568), (7688, 83369), (8866, 72292), (10571, 60632), (12493, 51304), (12584, 50933), (12826, 49972), (13144, 48763), (15004, 42718), (15158, 42284), (17732, 36146), (18073, 35464), (21142, 30316), (21359, 30008), (24986, 25652)]