388439920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:575

約数の個数: 160

約数和(自身を含む): 1054218240

約数和(自身を除く): 665778320

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 31, 40, 44, 55, 58, 62, 80, 88, 110, 116, 124, 145, 155, 176, 220, 232, 248, 290, 310, 319, 341, 440, 464, 491, 496, 580, 620, 638, 682, 880, 899, 982, 1160, 1240, 1276, 1364, 1595, 1705, 1798, 1964, 2320, 2455, 2480, 2552, 2728, 3190, 3410, 3596, 3928, 4495, 4910, 5104, 5401, 5456, 6380, 6820, 7192, 7856, 8990, 9820, 9889, 10802, 12760, 13640, 14239, 14384, 15221, 17980, 19640, 19778, 21604, 25520, 27005, 27280, 28478, 30442, 35960, 39280, 39556, 43208, 49445, 54010, 56956, 60884, 71195, 71920, 76105, 79112, 86416, 98890, 108020, 113912, 121768, 142390, 152210, 156629, 158224, 167431, 197780, 216040, 227824, 243536, 284780, 304420, 313258, 334862, 395560, 432080, 441409, 569560, 608840, 626516, 669724, 783145, 791120, 837155, 882818, 1139120, 1217680, 1253032, 1339448, 1566290, 1674310, 1765636, 2207045, 2506064, 2678896, 3132580, 3348620, 3531272, 4414090, 4855499, 6265160, 6697240, 7062544, 8828180, 9710998, 12530320, 13394480, 17656360, 19421996, 24277495, 35312720, 38843992, 48554990, 77687984, 97109980, 194219960, 388439920]

約数ペア:

[(1, 388439920), (2, 194219960), (4, 97109980), (5, 77687984), (8, 48554990), (10, 38843992), (11, 35312720), (16, 24277495), (20, 19421996), (22, 17656360), (29, 13394480), (31, 12530320), (40, 9710998), (44, 8828180), (55, 7062544), (58, 6697240), (62, 6265160), (80, 4855499), (88, 4414090), (110, 3531272), (116, 3348620), (124, 3132580), (145, 2678896), (155, 2506064), (176, 2207045), (220, 1765636), (232, 1674310), (248, 1566290), (290, 1339448), (310, 1253032), (319, 1217680), (341, 1139120), (440, 882818), (464, 837155), (491, 791120), (496, 783145), (580, 669724), (620, 626516), (638, 608840), (682, 569560), (880, 441409), (899, 432080), (982, 395560), (1160, 334862), (1240, 313258), (1276, 304420), (1364, 284780), (1595, 243536), (1705, 227824), (1798, 216040), (1964, 197780), (2320, 167431), (2455, 158224), (2480, 156629), (2552, 152210), (2728, 142390), (3190, 121768), (3410, 113912), (3596, 108020), (3928, 98890), (4495, 86416), (4910, 79112), (5104, 76105), (5401, 71920), (5456, 71195), (6380, 60884), (6820, 56956), (7192, 54010), (7856, 49445), (8990, 43208), (9820, 39556), (9889, 39280), (10802, 35960), (12760, 30442), (13640, 28478), (14239, 27280), (14384, 27005), (15221, 25520), (17980, 21604), (19640, 19778)]