391999960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1073

約数の個数: 128

約数和(自身を含む): 1028505600

約数和(自身を除く): 636505640

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 31, 40, 44, 55, 58, 62, 88, 110, 116, 124, 145, 155, 220, 232, 248, 290, 310, 319, 341, 440, 580, 620, 638, 682, 899, 991, 1160, 1240, 1276, 1364, 1595, 1705, 1798, 1982, 2552, 2728, 3190, 3410, 3596, 3964, 4495, 4955, 6380, 6820, 7192, 7928, 8990, 9889, 9910, 10901, 12760, 13640, 17980, 19778, 19820, 21802, 28739, 30721, 35960, 39556, 39640, 43604, 49445, 54505, 57478, 61442, 79112, 87208, 98890, 109010, 114956, 122884, 143695, 153605, 197780, 218020, 229912, 245768, 287390, 307210, 316129, 337931, 395560, 436040, 574780, 614420, 632258, 675862, 890909, 1149560, 1228840, 1264516, 1351724, 1580645, 1689655, 1781818, 2529032, 2703448, 3161290, 3379310, 3563636, 4454545, 6322580, 6758620, 7127272, 8909090, 9799999, 12645160, 13517240, 17818180, 19599998, 35636360, 39199996, 48999995, 78399992, 97999990, 195999980, 391999960]

約数ペア:

[(1, 391999960), (2, 195999980), (4, 97999990), (5, 78399992), (8, 48999995), (10, 39199996), (11, 35636360), (20, 19599998), (22, 17818180), (29, 13517240), (31, 12645160), (40, 9799999), (44, 8909090), (55, 7127272), (58, 6758620), (62, 6322580), (88, 4454545), (110, 3563636), (116, 3379310), (124, 3161290), (145, 2703448), (155, 2529032), (220, 1781818), (232, 1689655), (248, 1580645), (290, 1351724), (310, 1264516), (319, 1228840), (341, 1149560), (440, 890909), (580, 675862), (620, 632258), (638, 614420), (682, 574780), (899, 436040), (991, 395560), (1160, 337931), (1240, 316129), (1276, 307210), (1364, 287390), (1595, 245768), (1705, 229912), (1798, 218020), (1982, 197780), (2552, 153605), (2728, 143695), (3190, 122884), (3410, 114956), (3596, 109010), (3964, 98890), (4495, 87208), (4955, 79112), (6380, 61442), (6820, 57478), (7192, 54505), (7928, 49445), (8990, 43604), (9889, 39640), (9910, 39556), (10901, 35960), (12760, 30721), (13640, 28739), (17980, 21802), (19778, 19820)]